Effects of G-trainer, cycle ergometry, and stretching on physiological and psychological recovery from endurance exercise

J Strength Cond Res. 2014 Dec;28(12):3453-61. doi: 10.1519/JSC.0000000000000577.


The purpose of this study was to compare the effectiveness of 3 treatment modes (Anti-Gravity Treadmill [G-trainer], stationary cycling [CompuTrainer], and static stretching) on the physiological and psychological recovery after an acute bout of exhaustive exercise. In a crossover design, 12 aerobically trained men (21.3 ± 2.3 years, 72.1 ± 8.1 kg, 178.4 ± 6.3 cm, (Equation is included in full-text article.): 53.7 ± 6.3 ml·kg·min) completed a 29-km stationary cycling time trial. Immediately after the time trial, subjects completed 30 minutes of G-trainer or CompuTrainer (40% (Equation is included in full-text article.)) or static stretching exercises. A significant time effect was detected for plasma lactate (p = 0.010) and serum cortisol (p = 0.039) after exercise. No treatment or treatment by time interaction was identified for lactate or cortisol, respectively. No main effects for time, treatment, or treatment by time interaction were identified for interleukin 6 (IL-6) and tumor necrosis factor α (TNF-α). No differences were observed among treatments in skeletal muscle peak power output, mean power output, time to peak power, and rate to fatigue at 24 hours postexercise bout. Finally, no significant changes in mood status were observed after exercise and between treatment groups. When compared with stationary cycling and static stretching, exercise recovery performed on the G-trainer was unable to reduce systemic markers of stress and inflammation, blood lactate, or improve anaerobic performance and psychological mood states after an exhaustive bout of endurance exercise. Further research is warranted that includes individualized recovery modalities to create balances between the stresses of training and competition.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Affect / physiology
  • Cross-Over Studies
  • Ergometry
  • Exercise / physiology*
  • Exercise / psychology*
  • Exercise Test
  • Humans
  • Hydrocortisone / blood
  • Interleukin-6 / blood
  • Lactic Acid / blood
  • Male
  • Muscle Fatigue
  • Muscle Strength
  • Muscle Stretching Exercises
  • Muscle, Skeletal / physiology*
  • Physical Endurance / physiology*
  • Recovery of Function*
  • Time Factors
  • Tumor Necrosis Factor-alpha / blood
  • Young Adult


  • Interleukin-6
  • Tumor Necrosis Factor-alpha
  • Lactic Acid
  • Hydrocortisone