Prolonged electrical muscle stimulation exercise improves strength and aerobic capacity in healthy sedentary adults

J Appl Physiol (1985). 2005 Dec;99(6):2307-11. doi: 10.1152/japplphysiol.00891.2004. Epub 2005 Aug 4.


This investigation evaluated training responses to prolonged electrical muscle stimulation (EMS) in sedentary adults. Fifteen healthy subjects (10 men, 5 women) with a sedentary lifestyle completed a 6-wk training program during which they completed an average of 29 1-h EMS sessions. The form of EMS used by the subjects was capable of eliciting a cardiovascular exercise response without loading the limbs or joints. It achieved this by means of inducing rapid, rhythmical contractions in the large leg muscles. A crossover study design was employed with subjects undergoing their habitual activity levels during the nontraining phase of the study. The training effect was evaluated by means of a treadmill test to determine peak aerobic capacity [peak oxygen consumption (Vo(2))], a 6-min walking distance test, and measurement of body mass index (BMI) and quadriceps muscle strength. At baseline, the mean values for peak Vo(2), 6-min walking distance, quadriceps strength, and BMI were 2.46 +/- 0.57 l/min, 493.3 +/- 36.8 m, 360.8 +/- 108.7 N, and 26.9 +/- 3.4 kg/m(2), respectively. After training, subjects demonstrated statistically significant improvements in all variables except BMI. Peak Vo(2) increased by an average of 0.24 +/- 0.16 l/min (P < 0.05), walking distance increased by 36.6 +/- 19.7 m (P < 0.005), and quadriceps strength increased by 87.5 +/- 55.9 N (P < 0.005); we did not observe a significant effect due to training on BMI (P > 0.05). These results suggest that EMS can be used in sedentary adults to improve physical fitness. It may provide a viable alternative to more conventional forms of exercise in this population.

Publication types

  • Randomized Controlled Trial

MeSH terms

  • Adaptation, Physiological / physiology
  • Adult
  • Aged
  • Cross-Over Studies
  • Electric Stimulation / methods*
  • Electric Stimulation Therapy / methods*
  • Exercise / physiology*
  • Exercise Therapy / methods*
  • Female
  • Humans
  • Leg / physiology
  • Male
  • Middle Aged
  • Muscle Contraction / physiology*
  • Muscle, Skeletal / innervation
  • Muscle, Skeletal / physiology*
  • Oxygen Consumption / physiology*
  • Physical Fitness / physiology*
  • Stress, Mechanical
  • Time Factors