TY  - JOUR
TI  - Comparison of the Contributions of Knee and Hip Muscle Strength on Maximum Oxygen Consumption Parameters During Continuous and Constant Test Protocols
AB  - Preliminary VO2max verification testing allows to examine the reproducibility of comparable tests in the same participants and helps to verify whether neuromuscular performance is associated with VO2max during different testing conditions. The main purpose of this study was to compare VO2max values obtained using a graded treadmill and cycling protocols and to verify whether the results are also reproducible during the constant time to exhaustion testing protocols. The second rationale of the study was to characterize the contributions of hip and knee muscle strength during four different testing conditions, and to determine how these quantities change when altering the modality of exercise for a given exercise intensity. A repeated measures study design was used. A total of 20 healthy male participants (21.20±2.17 years) underwent preliminary VO2max testing sessions on treadmill and cycling ergometers with 24-h intervals. Isokinetic strength performance of hip and knee muscles was tested at 60o /sec angular velocity. A paired and independent-sample t-test was performed for inter-group and intra-group comparisons. Linear regression was applied to determine the percentage of variation in VO2max testing outputs during either testing modality explained by hip and knee muscle strength parameters. Lower extremity strength characteristics of hip and knee were symmetric between the dominant and nondominant limb (p>0.05). VO2max and blood lactate concentration were significantly greater during constant testing protocols for either testing modalities (p<0.001). Hip muscle strength performance explained a greater variation in VO2max parameters during incremental (cycling r2= 0.25, running r2= 0.24) and constant (cycling r 2= 0.35, running r2= 0.33) testing protocols for either testing modality compared to the contribution of knee muscle strength performance on VO2max parameters during incremental (cycling r2= 0.17, running r2= 0.17) and constant (cycling r2= 0.23, running r2= 0.18) testing protocols. The local muscular performance of the hip and knee muscles were strongly related with the changes in running and cycling mechanics and hip muscles had a greater contribution to the VO2max performance during constant protocols than knee muscles. In conclusion, the extent to which contribution of lower extremity muscles during VO2max testing relies more on the mode of the exercise rather than the type of the testing modality
AU  - ACAR, Nasuh Evrim
AU  - Umutlu, Gökhan
DO  - 10.17644/sbd.995087
PY  - 2022
JO  - Spor Bilimleri Dergisi
VL  - 33
IS  - 1
SN  - 1300-3119
SP  - 32
EP  - 42
DB  - TRDizin
UR  - http://search/yayin/detay/1121944
ER  -