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Title The Marc ProTM Device Improves Muscle Performance and Recovery from Concentric and Eccentric Exercise Induced Muscle Fatigue in Humans: A Pilot Study
Author Westcott Wayne L., Chen Thomas, Neric Francis B, DiNubile Nicholas, Bowirrat Abdalla, Madigan Margaret, Downs B. William, Giordano John, Morse Siobhan, Chen Amanda LC, Bajaj Anish, Kerner Mallory, Braverman Eric, Reinl Gary, Blakemore Max, Whitehead Scott, Sacks Lester, Blum Kenneth
Abstract
Westcott WL, Chen T, Neric FB, DiNubile N, Bowirrat A, Madigan M, Downs BW, Giordano J, Morse S, LC Chen A, Bajaj A, Kerner M, Braverman E, Reinl G, Blakemore M, Whitehead S, Sacks L, Blum K. The Marc ProTM Device Improves Muscle Performance and Recovery from Concentric and Eccentric Exercise Induced Muscle Fatigue inHumans: A Pilot Study. JEPonline 2011;14(2):55-67. To date, a product or routine that consistently relieves delayed onset muscle soreness
(DOMS) caused by eccentric exercise has yet to be identified. Our latest 56
research results indicate that a new device called Marc Pro™ (MPD) significantly improves musclerecovery and muscle endurance from combined concentric and eccentric exercise in healthy recreational exercisers. In the first study, 14 subjects (no prior soreness upon study entry) performed strength training activity (leg extension exercise with eccentric emphasis) to produce DOMS in the quadriceps muscles. All participants received one-hour of MPD stimulation on the right leg only
following the exercise session whereby each participant served as their own control. One day later,assessment of muscle soreness revealed significantly less discomfort in the right leg (MPD) than in the left leg (no MPD) in all subjects and in responders, respectively (p < 0.008; p < 0.002 ). The number of repetitions completed with the right leg (MPD) was significantly greater than the number of repetitions completed with the left leg (no MPD) in all subjects and in responders, respectively (p <0.03; p < 0.008). In the second experiment, 13 subjects (no prior soreness upon study entry) utilized a modestly challenging uphill/downhill hike to produce DOMS in thequadriceps muscles. Following the hike the subjects’ right leg received MPD stimulation for 60 minutes, whereas the left leg received no MPD application. Reported soreness was significantly less in the right leg (MPD) than in the left
leg (no MPD) in all participants and in responders, respectively (p < 0.0008; p < 0.0002). These results suggest that MPD stimulation results in a significant reduction in DOMS following strenuous unaccustomed eccentric exercise and significantly greater muscle endurance performance, as measured by leg extension repetitions. Investigation of Marc ProTM in a larger population is underway
and must await confirmation.
Citation
Keywords Marc ProTM Device (MPD), MARC, Muscle Recovery, Delayed Onset Muscle Soreness (DOMS), Concentric and Eccentric Exercise
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