Inclusion Criteria:  Recreationally active individuals Diagnosed asthma and/or mild exercise-induced bronchoconstriction: defined by an FEV1 fall equal to or greater than 10% but lower than 25% in the eucapnic hyperventilatory test. Able to securely perform a maximal exercise test (responded 'no' to all questions on the PAR-Q+ questionnaire) Able to communicate in English  Exclusion Criteria:  Diagnosed with any cardiorespiratory or vascular diseases Pregnant or potentially pregnant Non-smoking Lower limb musculoskeletal injury or lower limb limitation to cycle on a bicycle ergometer Recent respiratory symptoms or upper tract infection within 4 weeks On vitamin (e.g., C or E) supplementation