Effect of Collagen Peptides, in Combination With Resistance Training, on Body Composition and Muscle Strength in Untrained Men

Inclusion Criteria: * Male, between 30 and 60 years of age * Fat mass \>25 % as measured by bioelectrical impedance analysis * Stable weight (±5 %) and eating behaviour within the last 3 months. * Signed informed consent Exclusion Criteria: * Regular physical activity \>60 min / week * Stabile or progressive diseases/conditions (including medication) contraindicating or disabling participation in intensive exercise training and/or with potential to affect training adaptation beyond normal variation. For example: * Contraindications against physical stress corresponding guidelines of American College of Sports Medicine (ACSM) * Subjective symptoms during exercise (e.g., unusual physical exhaustion, dyspnoea, nausea) * Moderate to severe mobility limitation (i.e., due to rheumatic disease) * Diagnosis of cancer within the last 5 years * Diabetes mellitus I and II uncontrolled arterial hypertension (systolic blood pressure \>155 for mmHg and/or diastolic blood pressure \>94 mm Hg; mild hypertension under resting condition will be allowed but such participants will be recommended to consult their general practitioner). * Conditions contraindicating the supplementation protocol. * Contraindications against nutritional or ergogenic supplements * Allergy/aversion against animal protein * Liver or kidney diseases with a non-permission to ingest certain concentrations of protein.