Insight - Force Vs Pressure Plates
Pressure plates give an average of vertical force. The limitations in the pressure plate data is that you don't know what combination of pressure vs actual weight transfer created the presented numbers. Force plates can be great for providing useful data, but the most common force plate (swing catalyst) is a single plate system. This means that it has some challenges with interpreting data changes. By knowing what the numbers mean, you have a better chance avoiding confusion from grand claims.
Pressure plates give an average of vertical force. The limitations in the pressure plate data is that you don't know what combination of pressure vs actual weight transfer created the presented numbers. Force plates can be great for providing useful data, but the most common force plate (swing catalyst) is a single plate system. This means that it has some challenges with interpreting data changes. By knowing what the numbers mean, you have a better chance avoiding confusion from grand claims.
Video Transcript
1
00:00:00.000 --> 00:00:05.880
This golf smart insight is understanding pressure plates versus forced plates.
2
00:00:05.880 --> 00:00:10.290
So pressure plates, forced plates, there are different ways of measuring how
3
00:00:10.290 --> 00:00:11.200
the feet interact
4
00:00:11.200 --> 00:00:12.440
with the ground.
5
00:00:12.440 --> 00:00:16.850
Now golf instructors have long talked about how you want to have your feet
6
00:00:16.850 --> 00:00:17.600
working against
7
00:00:17.600 --> 00:00:21.040
the ground, how you want your swing to start from the ground up.
8
00:00:21.040 --> 00:00:24.490
We've got cool ways to potentially measure it, but you need to understand how
9
00:00:24.490 --> 00:00:24.920
each of
10
00:00:24.920 --> 00:00:30.030
these systems is measuring either pressure or force so that you don't get too
11
00:00:30.030 --> 00:00:30.720
confused
12
00:00:30.720 --> 00:00:34.160
by the information that you get back from the analysis.
13
00:00:34.160 --> 00:00:36.360
So first let's talk about pressure plates.
14
00:00:36.360 --> 00:00:41.560
The most common one would be body track, but pressure plates are just taking
15
00:00:41.560 --> 00:00:43.400
where my body
16
00:00:43.400 --> 00:00:47.160
is pressing into this mat and then averaging it.
17
00:00:47.160 --> 00:00:54.360
So let's say I've got kind of a scale, right?
18
00:00:54.360 --> 00:00:59.440
If I've got my feet along this scale, I could have 100% on the right, I could
19
00:00:59.440 --> 00:01:00.680
have 100%
20
00:01:00.680 --> 00:01:01.680
on the left.
21
00:01:01.680 --> 00:01:06.090
I could have my body over here, but be pushing down with the trail foot and it
22
00:01:06.090 --> 00:01:06.560
would shift
23
00:01:06.560 --> 00:01:10.970
this way along the scale where I could be over here and pushing down with that
24
00:01:10.970 --> 00:01:11.240
front
25
00:01:11.240 --> 00:01:13.520
foot and have it shift towards the target.
26
00:01:13.520 --> 00:01:17.520
So it's not really looking at where my weight is or where my mass is, it's
27
00:01:17.520 --> 00:01:18.560
looking at where
28
00:01:18.560 --> 00:01:19.720
I'm pressing.
29
00:01:19.720 --> 00:01:24.270
So for instance, I could be in a good driver position and have this foot almost
30
00:01:24.270 --> 00:01:24.760
off the
31
00:01:24.760 --> 00:01:30.560
ground so it would show that 100% of my pressure is over on the front foot.
32
00:01:30.560 --> 00:01:35.730
That could be a little confusing if you saw someone who is in this position and
33
00:01:35.730 --> 00:01:36.520
they said
34
00:01:36.520 --> 00:01:40.520
that they had 100% of their weight in that front foot.
35
00:01:40.520 --> 00:01:43.930
So pressure plates is really just taking the average of how I'm pushing down
36
00:01:43.930 --> 00:01:44.500
and putting
37
00:01:44.500 --> 00:01:47.780
it in this left to right scale.
38
00:01:47.780 --> 00:01:50.400
The next step up would be looking at force plates.
39
00:01:50.400 --> 00:01:54.680
So a force plate would be looking at something like a swing catalyst.
40
00:01:54.680 --> 00:02:00.470
So swing catalyst is able to see the direction and the amplitude of where I'm
41
00:02:00.470 --> 00:02:01.480
pressing.
42
00:02:01.480 --> 00:02:05.980
So they will typically, the swing catalyst is one plate and that's an important
43
00:02:05.980 --> 00:02:06.400
thing
44
00:02:06.400 --> 00:02:13.770
to understand because since it's a one plate system, it basically takes what
45
00:02:13.770 --> 00:02:14.400
both of my
46
00:02:14.400 --> 00:02:19.600
feet are doing and then presents the net sum, not what each foot is doing.
47
00:02:19.600 --> 00:02:24.110
The next wave will be in order to really see what each foot is doing, you need
48
00:02:24.110 --> 00:02:26.400
two different
49
00:02:26.400 --> 00:02:27.520
force plates.
50
00:02:27.520 --> 00:02:32.330
So in the pressure example, I could be pushing, let's say I'm pushing, I'm just
51
00:02:32.330 --> 00:02:33.120
standing here
52
00:02:33.120 --> 00:02:35.880
so my weight is in the center just like this.
53
00:02:35.880 --> 00:02:40.290
Well, I'm pushing down and this doesn't know if I'm pushing down in any
54
00:02:40.290 --> 00:02:41.640
different direction.
55
00:02:41.640 --> 00:02:44.360
It's just measuring how much I'm pushing down.
56
00:02:44.360 --> 00:02:48.480
A force plate, similar to a swing catalyst, would be able to tell me how much
57
00:02:48.480 --> 00:02:48.960
or what
58
00:02:48.960 --> 00:02:51.160
direction I'm pushing.
59
00:02:51.160 --> 00:02:55.120
Now the problem is, again, because it's one plate, let's say it's looking at
60
00:02:55.120 --> 00:02:55.640
the amount
61
00:02:55.640 --> 00:02:57.760
of left to right movement.
62
00:02:57.760 --> 00:03:06.050
I don't know if let's say I'm here in my setup and then as I go to take away,
63
00:03:06.050 --> 00:03:07.520
it says that
64
00:03:07.520 --> 00:03:14.300
I am applying a force in that direction which propels my body in this direction
65
00:03:14.300 --> 00:03:14.680
.
66
00:03:14.680 --> 00:03:18.140
I don't know if I'm doing it because I'm pushing with the left foot or if I'm
67
00:03:18.140 --> 00:03:18.680
pushing
68
00:03:18.680 --> 00:03:21.320
with the right foot.
69
00:03:21.320 --> 00:03:26.290
So the easy kind of way to see where this complication could come up would be
70
00:03:26.290 --> 00:03:26.800
if you're
71
00:03:26.800 --> 00:03:29.400
looking at the amount of twisting.
72
00:03:29.400 --> 00:03:35.190
So the torque graph or the torque data will show you how much my body is
73
00:03:35.190 --> 00:03:36.520
creating, let's
74
00:03:36.520 --> 00:03:42.310
say torque in the right direction in order to propel myself in the leftward
75
00:03:42.310 --> 00:03:44.320
direction.
76
00:03:44.320 --> 00:03:50.110
So it doesn't necessarily, or it doesn't know if it's because I'm twisting my
77
00:03:50.110 --> 00:03:50.240
right
78
00:03:50.240 --> 00:03:56.030
foot, twisting my left foot, I could be pushing linearly and creating that
79
00:03:56.030 --> 00:03:56.440
torque.
80
00:03:56.440 --> 00:04:01.610
There are lots of different combinations that could create the exact same
81
00:04:01.610 --> 00:04:02.520
pattern.
82
00:04:02.520 --> 00:04:06.930
So what we really need is what the research laboratories have which is
83
00:04:06.930 --> 00:04:08.400
individual platforms
84
00:04:08.400 --> 00:04:10.000
underneath each foot.
85
00:04:10.000 --> 00:04:16.800
So then I could see with this one foot, is it pushing to the left, to the right
86
00:04:16.800 --> 00:04:17.160
, where
87
00:04:17.160 --> 00:04:21.740
is the pressure within the foot, what direction am I pushing, what amplitude,
88
00:04:21.740 --> 00:04:23.280
or what magnitude,
89
00:04:23.280 --> 00:04:25.600
it would give me a whole lot of information.
90
00:04:25.600 --> 00:04:32.070
So you want to be careful with interpreting too much from these force graphs
91
00:04:32.070 --> 00:04:32.960
because especially
92
00:04:32.960 --> 00:04:37.710
with like a body track or a swing catalyst, the way that they are currently
93
00:04:37.710 --> 00:04:38.680
measuring,
94
00:04:38.680 --> 00:04:43.740
there's a lot that could be misinterpreted by either the practitioner or by
95
00:04:43.740 --> 00:04:44.720
your body.
96
00:04:44.720 --> 00:04:47.990
So if I say get all your pressure into your lead foot, you may think that you
97
00:04:47.990 --> 00:04:48.440
have to
98
00:04:48.440 --> 00:04:52.360
shift your weight, it could be just pushing harder.
99
00:04:52.360 --> 00:04:55.770
If I say that you need to twist against the ground more because you're not
100
00:04:55.770 --> 00:04:57.000
twisting enough,
101
00:04:57.000 --> 00:05:00.480
I'm not telling you, hey, to do it from the right foot, to do it from the left
102
00:05:00.480 --> 00:05:00.920
foot, to
103
00:05:00.920 --> 00:05:06.240
do it from a force couple, I'm hoping that you'll be able to match the data in
104
00:05:06.240 --> 00:05:07.080
the proper
105
00:05:07.080 --> 00:05:09.800
way and that's not always the case.
106
00:05:09.800 --> 00:05:13.580
So if you like the way that we analyze and break down the current trends in
107
00:05:13.580 --> 00:05:14.720
golf instruction,
108
00:05:14.720 --> 00:05:18.490
you'll love our concept videos and drill videos inside the membership area at
109
00:05:18.490 --> 00:05:19.920
golfsmartacademy.com.
Have questions?
Ask Mulligan for helpInsight - Force Vs Pressure Plates
Pressure plates give an average of vertical force. The limitations in the pressure plate data is that you don't know what combination of pressure vs actual weight transfer created the presented numbers. Force plates can be great for providing useful data, but the most common force plate (swing catalyst) is a single plate system. This means that it has some challenges with interpreting data changes. By knowing what the numbers mean, you have a better chance avoiding confusion from grand claims.
Pressure plates give an average of vertical force. The limitations in the pressure plate data is that you don't know what combination of pressure vs actual weight transfer created the presented numbers. Force plates can be great for providing useful data, but the most common force plate (swing catalyst) is a single plate system. This means that it has some challenges with interpreting data changes. By knowing what the numbers mean, you have a better chance avoiding confusion from grand claims.
Video Transcript
1
00:00:00.000 --> 00:00:05.880
This golf smart insight is understanding pressure plates versus forced plates.
2
00:00:05.880 --> 00:00:10.290
So pressure plates, forced plates, there are different ways of measuring how
3
00:00:10.290 --> 00:00:11.200
the feet interact
4
00:00:11.200 --> 00:00:12.440
with the ground.
5
00:00:12.440 --> 00:00:16.850
Now golf instructors have long talked about how you want to have your feet
6
00:00:16.850 --> 00:00:17.600
working against
7
00:00:17.600 --> 00:00:21.040
the ground, how you want your swing to start from the ground up.
8
00:00:21.040 --> 00:00:24.490
We've got cool ways to potentially measure it, but you need to understand how
9
00:00:24.490 --> 00:00:24.920
each of
10
00:00:24.920 --> 00:00:30.030
these systems is measuring either pressure or force so that you don't get too
11
00:00:30.030 --> 00:00:30.720
confused
12
00:00:30.720 --> 00:00:34.160
by the information that you get back from the analysis.
13
00:00:34.160 --> 00:00:36.360
So first let's talk about pressure plates.
14
00:00:36.360 --> 00:00:41.560
The most common one would be body track, but pressure plates are just taking
15
00:00:41.560 --> 00:00:43.400
where my body
16
00:00:43.400 --> 00:00:47.160
is pressing into this mat and then averaging it.
17
00:00:47.160 --> 00:00:54.360
So let's say I've got kind of a scale, right?
18
00:00:54.360 --> 00:00:59.440
If I've got my feet along this scale, I could have 100% on the right, I could
19
00:00:59.440 --> 00:01:00.680
have 100%
20
00:01:00.680 --> 00:01:01.680
on the left.
21
00:01:01.680 --> 00:01:06.090
I could have my body over here, but be pushing down with the trail foot and it
22
00:01:06.090 --> 00:01:06.560
would shift
23
00:01:06.560 --> 00:01:10.970
this way along the scale where I could be over here and pushing down with that
24
00:01:10.970 --> 00:01:11.240
front
25
00:01:11.240 --> 00:01:13.520
foot and have it shift towards the target.
26
00:01:13.520 --> 00:01:17.520
So it's not really looking at where my weight is or where my mass is, it's
27
00:01:17.520 --> 00:01:18.560
looking at where
28
00:01:18.560 --> 00:01:19.720
I'm pressing.
29
00:01:19.720 --> 00:01:24.270
So for instance, I could be in a good driver position and have this foot almost
30
00:01:24.270 --> 00:01:24.760
off the
31
00:01:24.760 --> 00:01:30.560
ground so it would show that 100% of my pressure is over on the front foot.
32
00:01:30.560 --> 00:01:35.730
That could be a little confusing if you saw someone who is in this position and
33
00:01:35.730 --> 00:01:36.520
they said
34
00:01:36.520 --> 00:01:40.520
that they had 100% of their weight in that front foot.
35
00:01:40.520 --> 00:01:43.930
So pressure plates is really just taking the average of how I'm pushing down
36
00:01:43.930 --> 00:01:44.500
and putting
37
00:01:44.500 --> 00:01:47.780
it in this left to right scale.
38
00:01:47.780 --> 00:01:50.400
The next step up would be looking at force plates.
39
00:01:50.400 --> 00:01:54.680
So a force plate would be looking at something like a swing catalyst.
40
00:01:54.680 --> 00:02:00.470
So swing catalyst is able to see the direction and the amplitude of where I'm
41
00:02:00.470 --> 00:02:01.480
pressing.
42
00:02:01.480 --> 00:02:05.980
So they will typically, the swing catalyst is one plate and that's an important
43
00:02:05.980 --> 00:02:06.400
thing
44
00:02:06.400 --> 00:02:13.770
to understand because since it's a one plate system, it basically takes what
45
00:02:13.770 --> 00:02:14.400
both of my
46
00:02:14.400 --> 00:02:19.600
feet are doing and then presents the net sum, not what each foot is doing.
47
00:02:19.600 --> 00:02:24.110
The next wave will be in order to really see what each foot is doing, you need
48
00:02:24.110 --> 00:02:26.400
two different
49
00:02:26.400 --> 00:02:27.520
force plates.
50
00:02:27.520 --> 00:02:32.330
So in the pressure example, I could be pushing, let's say I'm pushing, I'm just
51
00:02:32.330 --> 00:02:33.120
standing here
52
00:02:33.120 --> 00:02:35.880
so my weight is in the center just like this.
53
00:02:35.880 --> 00:02:40.290
Well, I'm pushing down and this doesn't know if I'm pushing down in any
54
00:02:40.290 --> 00:02:41.640
different direction.
55
00:02:41.640 --> 00:02:44.360
It's just measuring how much I'm pushing down.
56
00:02:44.360 --> 00:02:48.480
A force plate, similar to a swing catalyst, would be able to tell me how much
57
00:02:48.480 --> 00:02:48.960
or what
58
00:02:48.960 --> 00:02:51.160
direction I'm pushing.
59
00:02:51.160 --> 00:02:55.120
Now the problem is, again, because it's one plate, let's say it's looking at
60
00:02:55.120 --> 00:02:55.640
the amount
61
00:02:55.640 --> 00:02:57.760
of left to right movement.
62
00:02:57.760 --> 00:03:06.050
I don't know if let's say I'm here in my setup and then as I go to take away,
63
00:03:06.050 --> 00:03:07.520
it says that
64
00:03:07.520 --> 00:03:14.300
I am applying a force in that direction which propels my body in this direction
65
00:03:14.300 --> 00:03:14.680
.
66
00:03:14.680 --> 00:03:18.140
I don't know if I'm doing it because I'm pushing with the left foot or if I'm
67
00:03:18.140 --> 00:03:18.680
pushing
68
00:03:18.680 --> 00:03:21.320
with the right foot.
69
00:03:21.320 --> 00:03:26.290
So the easy kind of way to see where this complication could come up would be
70
00:03:26.290 --> 00:03:26.800
if you're
71
00:03:26.800 --> 00:03:29.400
looking at the amount of twisting.
72
00:03:29.400 --> 00:03:35.190
So the torque graph or the torque data will show you how much my body is
73
00:03:35.190 --> 00:03:36.520
creating, let's
74
00:03:36.520 --> 00:03:42.310
say torque in the right direction in order to propel myself in the leftward
75
00:03:42.310 --> 00:03:44.320
direction.
76
00:03:44.320 --> 00:03:50.110
So it doesn't necessarily, or it doesn't know if it's because I'm twisting my
77
00:03:50.110 --> 00:03:50.240
right
78
00:03:50.240 --> 00:03:56.030
foot, twisting my left foot, I could be pushing linearly and creating that
79
00:03:56.030 --> 00:03:56.440
torque.
80
00:03:56.440 --> 00:04:01.610
There are lots of different combinations that could create the exact same
81
00:04:01.610 --> 00:04:02.520
pattern.
82
00:04:02.520 --> 00:04:06.930
So what we really need is what the research laboratories have which is
83
00:04:06.930 --> 00:04:08.400
individual platforms
84
00:04:08.400 --> 00:04:10.000
underneath each foot.
85
00:04:10.000 --> 00:04:16.800
So then I could see with this one foot, is it pushing to the left, to the right
86
00:04:16.800 --> 00:04:17.160
, where
87
00:04:17.160 --> 00:04:21.740
is the pressure within the foot, what direction am I pushing, what amplitude,
88
00:04:21.740 --> 00:04:23.280
or what magnitude,
89
00:04:23.280 --> 00:04:25.600
it would give me a whole lot of information.
90
00:04:25.600 --> 00:04:32.070
So you want to be careful with interpreting too much from these force graphs
91
00:04:32.070 --> 00:04:32.960
because especially
92
00:04:32.960 --> 00:04:37.710
with like a body track or a swing catalyst, the way that they are currently
93
00:04:37.710 --> 00:04:38.680
measuring,
94
00:04:38.680 --> 00:04:43.740
there's a lot that could be misinterpreted by either the practitioner or by
95
00:04:43.740 --> 00:04:44.720
your body.
96
00:04:44.720 --> 00:04:47.990
So if I say get all your pressure into your lead foot, you may think that you
97
00:04:47.990 --> 00:04:48.440
have to
98
00:04:48.440 --> 00:04:52.360
shift your weight, it could be just pushing harder.
99
00:04:52.360 --> 00:04:55.770
If I say that you need to twist against the ground more because you're not
100
00:04:55.770 --> 00:04:57.000
twisting enough,
101
00:04:57.000 --> 00:05:00.480
I'm not telling you, hey, to do it from the right foot, to do it from the left
102
00:05:00.480 --> 00:05:00.920
foot, to
103
00:05:00.920 --> 00:05:06.240
do it from a force couple, I'm hoping that you'll be able to match the data in
104
00:05:06.240 --> 00:05:07.080
the proper
105
00:05:07.080 --> 00:05:09.800
way and that's not always the case.
106
00:05:09.800 --> 00:05:13.580
So if you like the way that we analyze and break down the current trends in
107
00:05:13.580 --> 00:05:14.720
golf instruction,
108
00:05:14.720 --> 00:05:18.490
you'll love our concept videos and drill videos inside the membership area at
109
00:05:18.490 --> 00:05:19.920
golfsmartacademy.com.
Have questions about this video?
Ask Mulligan for personalized guidance on technique, drills, or how to apply what you've learned.
Ask Mulligan