Journal Articles

Permanent URI for this collectionhttps://mro.massey.ac.nz/handle/10179/7915

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Author: search.filters.author.Ali ASubject: search.filters.subject.cycling

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    Effects of carbohydrate, caffeine, and combined mouth rinses on physiological and perceptual responses during high-intensity interval exercise following a pre-exercise meal: a double-blinded, placebo-controlled, randomized crossover trial
    (Taylor and Francis Group, 2025-12-31) Suen MW-K; Sun F; Ali A; Poon ET-C
    Background Mouth rinsing with carbohydrate (CHO), caffeine (CAF), and their combined (CHO+CAF) solutions has been shown to enhance exercise performance. However, most previous studies were conducted under fasted conditions, which may not accurately reflect the typical practices of athletes who generally consume food before intense exercise or competition. This study examined the effects of CHO, CAF, and CHO+CAF mouth rinses on physiological and perceptual responses during high-intensity interval exercise (HIIE) following a pre-exercise meal. Methods Twelve recreationally active males (age: 23.4 ± 3.2 years) completed four HIIE trials involving 8 bouts of 1-min cycling at 85% of peak power output (PPO), separated by 1-min active recovery at 20% of PPO. Using a double-blinded randomized crossover design, participants rinsed with either 10% maltodextrin (CHO), 1.2% caffeine (CAF), 10% maltodextrin + 1.2% caffeine (CHO+CAF), or water (PLA) twice in each trial (after warm-up and interval 4). All solutions were taste-matched using the artificial sweetener sucralose. A standardized CHO-rich (1 g·kg−1 body weight) breakfast was provided an hour before testing. Results Ratings of perceived exertion were significantly different between conditions after interval 4 (CHO: 12.3 ± 1.6; CAF: 13.5 ± 2.2; CHO+CAF: 12.7 ± 1.7; PLA: 13.7 ± 2.4; 𝑝 = 0.049, 𝜂2 𝑝 = 0.21), but no significant effects of the mouth rinse conditions were observed on heart rate, blood glucose, blood lactate, affective valence, perceived activation, or affective responses (pleasure, arousal, and dominance) (all p > 0.05). Conclusion These findings suggest a limited ergogenic benefit of CHO and/or CAF mouth rinse through physiological and perceptual responses following sufficient food intake.
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    Carbohydrates and Endurance Exercise: A Narrative Review of a Food First Approach.
    (MDPI (Basel, Switzerland), 2023-03-11) Naderi A; Gobbi N; Ali A; Berjisian E; Hamidvand A; Forbes SC; Koozehchian MS; Karayigit R; Saunders B; Stanhope KL
    Carbohydrate (CHO) supplements such as bars, gels, drinks and powders have become ubiquitous as effective evidence-based CHO sources that improve endurance exercise performance. However, athletes are increasingly turning to more cost-effective 'food-first' approaches for CHO ingestion to improve exercise performance. Mixed CHO foods including cooked lentils, oats, honey, raisins, rice, and potatoes are all effective pre-exercise CHO food sources. Caution is advised when selecting some of these foods as a primary CHO source, as some athletes may be prone to gastrointestinal discomfort-especially regarding those foods where the quantities required for recommended CHO intake may be voluminous (e.g., potatoes). Palatability may be another barrier to the ingestion of some of these CHO-rich foods. Although most of these CHO-rich foods appear effective for exercise performance or recovery when consumed pre- and post-exercise, not all are viable to ingest during exercise due to difficulties in the quantities required, transport, and/or gastrointestinal discomfort. Raisins, bananas and honey may be particularly useful CHO foods for consumption during exercise, as they are easily transportable. Athletes should trial CHO food sources before, during and/or following training before implementation during competition.