Protein Supplementation and HIIT: Impact on Cardiorespiratory Fitness

Effects of High-intensity Interval Training Combined With Post-exercise Protein Supplementation on Cardiorespiratory Fitness in Untrained Individuals: a Double-blind Placebo-controlled Trial

The aim of this study is to investigate the effects of an 8-week high-intensity interval training (HIIT) or HIIT plus resistance training program combined with post-exercise protein supplementation on cardiorespiratory fitness and cardiometabolic risk indices in previously untrained individuals.

Inclusion Criteria:

• Sedentary Lifestyle over at least 6 months prior to the study

Exclusion Criteria:

• Pregnancy, Lactation
• Psychological disorders, epilepsy, sever neurological disorders
• Participation in other exercise- or nutrition studies within the last 6 months
• coronary heart disease, heart failure
• malignant disease
• severe rheumatic or neurological disease
• severe/unstable hypertension (resting RR: >180/>110 mmHg)
• severely restricted lung function (FEV1 <60%)
• unstable Diabetes mellitus
• severe orthopedic disease/restriction
• acute / chronic infectious diseases
• Electronic implants (defibrillator, pacemaker)
• Persons in mental hospitals by order of authorities or jurisdiction