Affiliation: College of Arts and Sciences, Department of Exercise and Sport Science
This prospective study examined the effect of two-weeks of lower-body resistance training on cardiopulmonary capacity (VO2peak) as well as its impact on muscle strength/size in sedentary middle-aged females (n=18). VO2peak was assessed via a maximal cardiopulmonary exercise test (CPET), leg extensor strength via isokinetic dynamometry, and muscle size of the vastus lateralis (VL) (cross-sectional area (CSA)) using ultrasound. Both relative and absolute VO2peak significantly improved by 10.8% (p=0.002) and 10.7% (p=0.003), respectively. leg extension peak torque (PT) significantly improved by 6.1% (p=0.027), and EMG amplitude significantly improved by 41.3% (p=0.001). VL CSA did not increase in response to training (p=0.456). No significant relationship was observed between VO2peak changes and chosen strength variables (PT/Amplitude). In conclusion, the strength training appears to have had a positive effect on VO2peak.and strength in middle-aged females, however future studies including a control group are warranted to confirm or refute the results of this current study.