Handgrip strength does not represent an appropriate measure to evaluate changes in muscle strength during an exercise intervention program in frail older people

Int J Sport Nutr Exerc Metab. 2015 Feb;25(1):27-36. doi: 10.1123/ijsnem.2013-0123. Epub 2014 Jun 5.

Abstract

Introduction: Although handgrip strength is considered a strong predictor of negative health outcomes, it is unclear whether handgrip strength represents a useful measure to evaluate changes in muscle strength following resistance-type exercise training in older people. We assessed whether measuring handgrip strength provides proper insight in the efficacy of resistance-type exercise training to increase muscle mass, strength, and physical performance in frail older people.

Methods: Prefrail and frail older people (≥ 65 y) were either conducting a 24-week resistance-type exercise training or no exercise training. Before, during, and after the intervention, handgrip strength (JAMAR), lean body mass (DXA), leg strength (1-RM), and physical performance (SPPB) were assessed.

Results: Handgrip strength correlated with appendicular lean mass (r = 0.68; p < .001) and leg strength (r = 0.67; p < .001). After 24 weeks of whole body resistance-type exercise training, leg extension strength improved significantly better when compared with the control group (57 ± 2-78 ± 3 kg vs 57 ± 3-65 ± 3 kg: p < .001). Moreover, physical performance improved significantly more in the exercise group (8.0 ± 0.4-9.3 ± 0.4 points) when compared with the control group (8.3 ± 0.4-8.9 ± 0.4 points: p < .05). These positive changes were not accompanied with any significant changes in handgrip strength (26.3 ± 1.2-27.6 ± 1.2 kg in the exercise group vs 26.6 ± 1.2-26.3 ± 1.3 kg in the control group: p = .71).

Conclusion: Although handgrip strength strongly correlates with muscle mass and leg strength in frail older people, handgrip strength does not provide a valid means to evaluate the efficacy of exercise intervention programs to increase muscle mass or strength in an older population.

Publication types

  • Controlled Clinical Trial
  • Validation Study

MeSH terms

  • Aged
  • Aged, 80 and over
  • Diet Records
  • Female
  • Frail Elderly*
  • Geriatric Assessment / methods*
  • Hand Strength
  • Humans
  • Intention to Treat Analysis
  • Leg
  • Male
  • Muscle Development*
  • Muscle Strength*
  • Patient Compliance
  • Patient Dropouts
  • Psychomotor Performance
  • Resistance Training*
  • Sarcopenia / therapy*