**Powerdot requires iPhone 5 or later (with iOS 7.0+) or supported Android phones running Android 4.4+
Yes, you can add a second device later. You’ll just want to follow the duo instructions for syncing the two devices with the app.
For recovery and relaxation, you would apply Powerdot for 20-35 minutes to your most fatigued muscle groups.
For performance training, you should use Powerdot several times a week per muscle group for roughly 30 minutes. The actual session timing will vary between 15 and 60+ minutes based on which workout you selected.
Yes, the app is designed to work with two devices at once.
We recommend you either to sit or lie down when using Powerdot. The app will tell you if you should be sitting or lying down based on the program and muscle group you’re training. Feel free to work on your computer, read a book or watch TV during your session. We’re big fans of multitasking!NEVER use PowerDot while driving, operating machinery, doing physical training or any other action where involuntary muscle contraction can cause an accident or injury.
As long as you can see contractions under any of the pads there is no reason to worry. Your muscle will contract along its full length between the rectangular pad and each of the round pads.There could be a few things contributing to what you’re feeling:- Positioning of the pads. If rectangular pad is located closer to the nerve or muscle motor point, the brain can be putting more priority in delivering one muscle contraction feedback signal over another. We recommend experimenting with the position of the round pads on your muscle in order to see if you can find a position closer to the muscle belly (where motor points are usually located). - Muscle fatigue. If muscle fibers under your round pads are more tired than the ones under rectangular pad, a higher intensity will be required in order to notice the difference.
Power outputs of all Powerdot devices are pre-calibrated at the factory with low tolerance level. However, the following factors may account for what you’re experiencing:
Powerdot leverages Bluetooth Secure Simple Pairing mechanism, which securely encrypts communication between Powerdot and the phone using AES-128. In addition, a separate firmware-based secure code-based protection mechanism is used to make sure that only one Powerdot app (running from your phone) can connect, activate and use activated Powerdots.This is why a manual hard reset or app-based re-activation is required when you switch between phones or tablets.
Powerdot mobile apps and firmware are designed to work independently from other apps running on your phone, including calls, so your training session isn’t impacted.
Powerdot’s firmware is smart enough to independently complete and stop your stimulation session…even if the Bluetooth connection is lost between Powerdot and your phone/tablet.
Powerdot supports all iOS iPhone/iPod/iPad devices starting from iPhone 4S running iOS 8.0 and later.For Android, most of the recent Bluetooth Low Energy Android phones are well supported, however, due to a wide range of Bluetooth Low Energy (also known as Bluetooth Smart, Bluetooth 4.x) hardware and low-level drivers being used by the vendors, some phones are noticed for unstable behavior when controlling 2 Powerdots simultaneously (in a Duo mode). To date, the following problems are known to have issues with Duo operation:
Powerdot can generate power outputs up to 135V/13.5 mA under 10K Ohm resistance (small load) and up to 65V/130 mA under 500 Ohm resistance (heavy load) while using pulses as wide as 430 microseconds at stimulation frequencies of up to 120 Hz. This is within 10% range of other EMS/NMES devices on the market.According to our usage stats, 95%+ of users never use more than 60% of Powerdot maximum intensity with the majority staying in 25-50% range.
On average, one set of Powerdot electrode pads is good enough to last for 20-25 stimulation sessions. To extend lifetime of pads, we recommend you regularly clean the sticky side with antiseptic alcohol tissues to remove hair and oil. Attach the pads to the safety film prior to storing them.
Replace your pads when they no longer stick to your skin or when the sticky side is covered with lint.
Powerdot is using Li-Ion battery, which is, when fully charged, is good enough for at least 6 hours of continuous stimulation.One charge can easily cover a daily stimulation plan for the most demanding athlete (3 muscle groups at 75%+ intensities for the most energy consuming stimulation sessions).In general, an average active user should expect to re-charge Powerdot once a week or even once in 10 days.
Charging battery to full should not take more than 90 minutes. You can charge Powerdot from any micro-USB connection or standard USB-compatible AC charger. Powerdot comes with micro-USB-2-USB conversion cable.
Depending on the stimulation programs you choose, you’re likely to feel a tingling or tickling sensation caused by the stimulation current. These sensations don’t cause discomfort or pain.Powerdot allows you to adjust the intensity of contractions so you are always comfortable.
Powerdot muscle stimulation sessions are designed in a way that makes the muscle less likely to suffer from a tear than in regular training exercises. Muscle tears in sports often happen when muscle experiences a great amount of pressure almost instantly. Powerdot generates muscle contractions with that increase in intensity over extended periods of time. This gradual build up reduces the risk of muscle tears even under maximum intensity.Strengthening muscles through stim is a great way to protect your joints since no impact is placed on the joints during a session. EMS is a great option for building strength in athletes with weak or injured ankles, knees, or shoulders.
Several clinical studies have been conducted to determine the performance improvements gained from training with muscle stimulation. The results show users are able to achieve greater performance when they incorporate EMS into their training. We’ve included a list of these studies and a summary of the results below.The recovery and massage programs provide immediate relief. A user can expect to see performance improvements (increased strength or endurance) after 4 weeks of regular use (3 times a week per muscle group.
|Study/Link||Study Year||Study Group||Duration||Muscle Group(s)EMS frequency, duty cycle, duration||Results|
|Maffiuletti et al||2000||Basketball Players||4 weeks||Quads100 Hz, 3/17 sec, 48 contractions||· 14% squat jump increase· 17% counter movement jump increase|
|Maffiuletti et al||2002||Volleyball Players||6 weeks||Quads, Calves105-120 Hz, 3/17 sec, 48 contractions||· Maximum voluntary contraction increase by 20%/13% for Quads/Calves· up to 10% spike-counter movement jump increase· 21% squat jump increase|
|Malatesta et al||2003||Volleyball Players||4 weeks||Quads, Calves105-120 Hz, 4/29-34 sec, 20-22 contractions||· 6.5% squat jump increase· 5.4% counter movement jump increase|
|Brocherie et al||2005||Ice Hockey Players||3 weeks||Quads85 Hz, 4/20 sec, 30 contractions||· up to 37.1% eccentric torque increase· up to 49.2% concentric torque increase· 8.4% squat jump decrease· 6.1% counter movement jump decrease· 14.3% 15J power increase· 4.8% 10 m skating time improvement|
|Babault et al||2007||Elite Rugby Players||12 weeks||Quads, Calves, Glutes100 Hz, 5/15 sec, 36 contractions||· 15% squat strength increase· 10% squat jump increase· 6.1% 40 cm drop jump increase|
|Maffiuletti et al||2009||Tennis Players||3 weeks||Quads85 Hz, 5/25 sec, 30 contractions||· 6.4% counter movement jump increase· 3.3 cm CMJ-squat jump increase· 3.3% 2x10 m sprint time improvement|
|Billot et al||2010||Soccer Players||5 weeks||Quads100 Hz, 3/17 sec, 36 contractions||· 22.1% eccentric torque increase· 27.1% isometric torque increase· up to 23.2% concentric torque increase· 9.6% ball speed without run-up increase· 5.6% ball speed with run-up increase· 6.7% jump increase|
|Deley et al||2011||Gymnasts (Prepurbertal Girls)||6 weeks||Quads75 Hz, 4/20 sec, 30 contractions||· up to 50.6% maximum voluntary torque increase· 20.9% squat jump increase· 20.4% reactivity test improvement· 10.1% counter movement jump increase|
There is a multitude of peer reviewed articles and clinical studies (accessible from PubMed) that prove effectiveness of EMS (or, oftentimes, EMS is also known as NMES) for sports training and recovery. Here are the links to some of the most recent and interesting ones: