The objective of this study is to compare the body composition and physical performance effects of HIIT, with or without intermittent fasting intervention in active women. Fourteen active normal weight women aged 18-35 participated in the study. The effects of 2x8 weeks without (HIIT) or with (HIIT+IF) intermittent fasting caloric restriction (20% reduction in weekly energy intake) on body composition and performance (Hand-grip strength, Counter movement jump, Wingate Anaerobic 30 s Cycling Test), were compared. There were two weeks in between both phases when they did not perform the scheduled activity, so as not to alter the experimental phase.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
HEALTH_SERVICES_RESEARCH
Masking
NONE
Enrollment
14
2x8 weeks of high-intensity interval training (HIIT)
2x8 high-intensity interval training with (HIIT+IF) intermittent fasting caloric restriction (20% reduction in weekly energy intake).
Alejandro Martínez Rodriguez
San Vicent del Raspeig, Alicante, Spain
Hand-grip strength
Hand-grip strength test was performed as an indicator of overall strength.
Time frame: 16 weeks
Counter movement jump (CMJ)
In the CMJ test, the participants performed a maximum vertical jump starting from a standing position with arm swing not allowed.
Time frame: 16 weeks
Wingate Anaerobic 30 s Cycling Test
Wingate Anaerobic 30 s Cycling Test with a validated cycloergometer (Monark 894E, Vansbro, Sweden).
Time frame: 16 weeks
Fat mass
Body composition masses were estimated using validated equations. Carter's equation was used to estimate fat mass.
Time frame: 16 weeks
Muscle mass
Body composition masses were estimated using validated equations. Lee's equation to estimate muscle mass.
Time frame: 16 weeks
Residual mass
Body composition masses were estimated using validated equations. Residual mass was obtained from the difference between fat mass and muscle mass.
Time frame: 16 weeks
Body Mass
It was performed using a digital scale with 0,1kg accuracy (Tanita BC-545, Tokyo, Japan).
Time frame: 16 weeks
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