The goal of this experimental study is to examine the influence of Lemongrass extract on aerobic training parameters following a 6-week training programme in males. A secondary aim will be to explore the influence on sexual wellness. Participants will attend 23 visits to the laboratory involving: * fitness testing (some to exhaustion). * blood sampling (capillary and venous samples). * a supervised 6 week high-intensity interval training (HIIT) programme. * consuming either the lemongrass extract or placebo in the form of tablets, once a day during the 6 week training.
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Aerobic Capacity
Timeframe: This measure will assessed and measured twice: Baseline assessment: Visit 3 (Week 1, prior to the intervention). Post-intervention assessment: Visit 23 (Week 8, within 48 hours after the final training session).
Aerobic Performance (blood lactate)
Timeframe: This measure will be assessed three times. Familiarisation and lactate profiling: Visit 2 (Week 0). Baseline assessment: Visit 3 (Week 1, prior to the intervention), Post-intervention assessment: Visit 23 (Week 8, within 48 hrs after the final training).
Aerobic Performance (heart rate)
Timeframe: This measure will be assessed three times. Familiarisation and lactate profiling: Visit 2 (Week 0). Baseline assessment: Visit 3 (Week 1, prior to the intervention), Post-intervention assessment: Visit 23 (Week 8, within 48 hrs after the final training).