Electromyography (EMG) data from the infraspinatus were collected at a sampling rate of 1500 Hz using a TeleMyo 2400 G2 Telemetry System (Noraxon Inc., Scottsdale, AZ, USA) as per the recommended procedure.5 (link) The electrode sites were cleaned with alcohol, and 2 electrodes were placed 70 mm apart within the confines of the muscle as described by Criswell,9 and a reference electrode was placed over the C7 spinous process. This array has been used by various authors who have explored the surface EMG of the infraspinatus.1 (link) Disposable Ag/AgCl bipolar surface electrodes with 10-mm conducting area and 20-mm interelectrode distance (Noraxon Inc., Scottsdale, AZ, USA) were used to record the EMG. Once the pitching trials were completed, the established protocol 26 (link) was followed while participants completed 3 times, 3-second maximum voluntary isometric contraction of each muscle by contracting to the maximum against a fixed resistance with the recovery of 3 minutes between trials. The maximum voluntary isometric contraction trial involved a shoulder external rotation with shoulder neutral.
Telemyo 2400 g2 telemetry system
Manufactured by Noraxon
Sourced in United States
The TeleMyo 2400 G2 Telemetry System is a wireless data acquisition device designed for physiological measurements. It enables the collection and transmission of biometric data from subjects in real-time without physical constraints. The system features multiple channel inputs and supports a range of sensor types for various research and clinical applications.
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Lab products found in correlation
4 protocols using telemyo 2400 g2 telemetry system
1
Infraspinatus Muscle EMG Protocol
2
Measuring Lower Limb Joint Angles
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Knee and ankle joint angles were recorded using a twin-axis (Penny and Giles Biometrics Ltd., Blackwood Gwent, UK) and a custom-made potentiometer based electrogoniometer, respectively. The end blocks of the knee electrogoniometer were placed along the leg from the greater trochanter to the lateral femur epicondyle and along the leg from the lateral epicondyle of the femur to the lateral malleolus. The end blocks of the ankle electrogoniometer were placed along the leg from the lateral femur epicondyle to the lateral malleolus and from the lateral malleolus to the most distal end of the fifth metatarsal. Before each walking trial, a reference measurement was taken in the anatomical neutral position to define the 0° joint angles. Data were sampled at a frequency of 1,500 Hz via the TeleMyo 2400 G2 Telemetry System (Noraxon USA., Inc., Scottsdale, USA) and MyoResearch XP software (Master Edition 1.08.16).
3
Gait Biomechanics with Surface EMG
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Prior to the experiment, the skin surface of all participants was shaved, abraded and cleaned with alcohol before placing surface electromyography electrodes (EMG) (Ambu Neuroline 720 01-K/12, Ag/AgCl, inter electrode distance 20 mm, Ambu A/S, Ballerup, Denmark) over the following seven muscles of the dominant lower limb: biceps femoris (BF), vastus medialis (VM), vastus lateralis (VL), medial and lateral head of gastrocnemius (GM and GL), soleus (SOL) and tibialis anterior (TA). The electrodes were mounted in accordance to the SENIAM guidelines [Hermens et al, 2000] .
EMG data were collected using a wireless EMG amplifier (TeleMyo 2400 G2 Telemetry System, Noraxon U.S.A. Inc., Arizona, USA) at a sampling rate of 1500 Hz and with an individual specific gain factor (500-1000). Further, a footswitch (DTS Footswitch, Noraxon U.S.A. Inc., Arizona, USA) was mounted under the right foot, enabling the identification of heel strike during the gait cycle. All data were recorded from October through November in 2016.
EMG data were collected using a wireless EMG amplifier (TeleMyo 2400 G2 Telemetry System, Noraxon U.S.A. Inc., Arizona, USA) at a sampling rate of 1500 Hz and with an individual specific gain factor (500-1000). Further, a footswitch (DTS Footswitch, Noraxon U.S.A. Inc., Arizona, USA) was mounted under the right foot, enabling the identification of heel strike during the gait cycle. All data were recorded from October through November in 2016.
4
Knee and Ankle Joint Kinematics During Running
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Knee and ankle joint angles were recorded using a twin-axis (Penny and Giles Biometrics Ltd., Blackwood Gwent, UK) and a custom-made 2D-electrogoniometer, respectively. The end blocks of the knee electrogoniometer were positioned along the line from the greater trochanter to the lateral femur epicondyle and from the lateral femur epicondyle to the lateral malleolus. The end blocks of the ankle electrogoniometer were placed along the line from the lateral femur epicondyle to the lateral malleolus and from the lateral malleolus to the most distal end of the fifth metatarsal bone. Before each running trial, the goniometers were zeroed when in the anatomical neutral position (standing). Electrogoniometry data were sampled at 1500 Hz via the TeleMyo 2400 G2 Telemetry System (Noraxon USA., Inc., Scottsdale, USA) using the MyoResearch XP software (Master Edition 1.08.16). Electrogoniometry has been revealed to produce reliable and reproducible knee and ankle joint kinematics43 (link)–45 (link) and has already been used during running with reduced loading19 (link),26 (link),46 (link),47 (link).
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