Turkish Journal of Geriatrics 2018 , Vol 21, Issue 4
DO THE EFFECTS OF VITAMIN D SUPPLEMENTATION ON MUSCLE STRENGTH DIFFER ACCORDING TO AGE?
Gülsüm DOĞAN1, Naciye Füsun TORAMAN2, Neşe TOKTAŞ3, Meral BİLGİLİSOY FİLİZ2, Tuncay ÇAKIR4, Şebnem KOLDAŞ DOĞAN2, Tülay ERÇALIK5
1Pamukkale University, Faculty of Medicine, Department of Physical Medicine and Rehabilitation, Division of Rheumatology (formerly), Denizli, Turkey
2Health Sciences University, Antalya Training and Research Hospital, Physical Medicine and Rehabilitation Clinic, Antalya, Turkey
3Akdeniz University, Faculty of Sport Sciences, Antalya, Turkey
4Antalya Likya Hospital, Physical Medicine and Rehabilitation Clinic, Antalya, Turkey
5ÅžiÅŸli Etfal Training and Research Hospital, Physical Medicine and Rehabilitation Clinic, Division of Algologia, Ä°stanbul, Turkey
DOI : 10.31086/tjgeri.2018.58 Introduction: Vitamin D plays an important role in musculoskeletal health and its use improves muscle strength. However, the effect of vitamin D use on muscle strength in women of different ages is yet to be investigated. Therefore, in this study, we aimed to evaluate the effect of vitamin D use on muscle strength in women of different age groups and determine the differences of muscle strength gain between age groups.

Materials and Method: Sixty-three women with calcidiol levels<30 ng/mL were randomly assigned and stratified by their age group as follows: Group I (aged 40?49 years), Group II (aged 50?59 years) and Group III (aged 60?69 years). Calcidiol levels, body mass index, fat free mass, percent fat, grip strength, arm curl, chair stand and isokinetic concentric flexor and extensor peak torque and power at 60°?s?1 and 180°?s?1 were assessed at baseline and six months after oral cholecalciferol supplementation.

Results: Vitamin D supplementation caused significant improvement in body mass index, arm curl, grip strength and knee flexor and extensor peak torque and power at 60°?s?1 and 180°?s?1 in all groups (p<0.05). Knee flexor power at 60°?s?1 and extensor power at 180°?s?1 were significantly higher in group I than in group III (p<0.025).

Conclusion: Muscle strength in response to vitamin D supplementation increased in all age groups, and isokinetic muscle power was the highest in the youngest age group studied. Keywords : Body composition; Muscle strength; Vitamin D; Women