EMS involuntary contractions

When using EMS on hamstrings having difficulty finding location to hit it well and not cause a slight involuntary contraction (foot raises couple of inches up).

Also I wish to make sure I am using the correct setting synchronous and not alternating. If I select synchronous the customised program asks me if I want to use a delay value?

Charlie can you confirm this information for me or correct me, thanks.

Tried different pad locations, but still had involintary contractions with hamstring.

This may happen, just make sure the neg leads are towards to top of the hamstrings and that the whole area is flooded (contracted) you may need to play with pad position a bit more.
I can’t comment on the specific unit you’re using as I haven’t seen it.

Hi Charlie,

It is the neuro track sports.
The settings are:
Hz 24
uS pulse duration 300
clock time 10 min
work 10 sec
rest 50 sec
Ramp up .8
Then it asks for Alternate or Synchronous and for the delay time?

Also for team sport athlete is 10 seconds too long?

My Amplitude mA ranges from 0-90 mA. If I have an athlete who can handle 90 mA on the glutes is there a way to increase the intensity with a different setting, or is this unit not strong enough?

hey cf if you put the neg on top how can he use the cross style (x method) method you have in the book.

Bottom left to top right and bottom right to top left

just forget i asked that question.

Hi Charlie,

Do the settings above look ok?

nope not enough hz

What specifically is “uS pulse duration 300”? Are we talking about pulses per second? I think Charlie advocates a minimum of 20 hz which will apparently put the muscle into tetanus. In working with EMS myself for increases in strength and power I attempt to take as much voltage at the highest frequency possible. With the ARP that would be 2.5 watts at 500 pps. When the ARP is applied to healthy tissue the above maximum setting is tolerable for most athletes. When we’re talking about “unhealthy” or injured tissue (rehab) these settings are very tough to tolerate unless your very determined (like me!).

All stims are a bit different as are the people they treat. you can’t have a blanket rule for the amt of current. the more FT fibre and less fat an individual has, the less current it takes to get a max contraction.

you recommend at least 80hz right?

Mainly, I’m thinking of what I found to be most comfortable/tolerable.

the hz really dont > the intensity that much, mainly the intensity knobs.

Hi guys,

So should I change the Hz to 80 and what will be the difference to the athlete when I previously used 24. I can not remember why I chose 24.

Also what is the difference between Alternating and Synchronous. Is that simply mean ech channel will either work together or independently?

Would 10 seconds be to long for team sport athletes (baseball)

I am using Dura-Stick II pads 2 x 3.5 inches, are they too large? maybe that is why I am getting the involuntary contraction on the hamstring?

Most galvanic and/or interferential units will cause the sort of spastic contractions I think your referring to. One of the reasons its’ tough to use EMS actively (joint in motion) vs. passively. One of the benefits of the ARP is that the body’s natural resistance to the waveform “drops out” making joint movement possible. I get virtually no spastic, uncoordinated contractions with the ARP even when cranked up to 4 watts (I thought maximum output was 2.5 watts previously) and 500 pps. I know this info. does’nt due you any good. Addressing your terminology, all contractions stimulated through EMS are, or course, involuntary. I assume you are referring to an uncoordinated spastic type of response.

I’m hoping someone smarter than I can educate me. The ARP specifies output power in watts (maximum output power 4 watts). How do watts compare with microamps, volts, etc. I’m trying to determine how powerful nap’s unit is relative to the ARP and my lack of electrical engineering background makes this difficult. Can anyoune help me out here?

It also seems if I put the Hz up to 80 instead of 24 or 25 I cannot keep the upper quad in full contraction at the same ampage setting?

When stimulating the hamstrings the leg(shin comes off the table a couple of inches?

What is everybodys opinions on microcurrent(less than 1 amp) for recovery? And if you use it how do you set it up in conjunction with the rest of your training?