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Oral D-ribose supplementation has been reported to increase adenine nucle-otide synthesis and exercise capacity in certain clinical populations. Theoretically, increasing adenine nucleotide availability may enhance high intensity exercise capacity. This study evaluated the potential ergogenic value of D-ribose supplementation on repetitive high-intensity exercise capacity in 19 trained males. Subjects were familiarized to the testing protocol and performed two practice-testing trials before pre-supplementation testing. Each test involved warming up for 5 min on a cycle ergometer and then performing two 30-s Wingate anaerobic sprint tests on a computerized cycle ergometer separated by 3 min of rest recovery. In the pre- and post-supplementation trials, blood samples were obtained at rest, immediately following the first and second sprints, and following 5 min of recovery from exercise. Subjects were then matched according to body mass and anaerobic capacity and assigned to ingest, in a randomized and double blind manner, capsules containing either 5 g of a dextrose placebo (P) or D-ribose (R) twice daily (10 g/d) for 5 d. Subjects then performed post-supplementation tests on the 6th day. Data were analyzed by ANOVA for repeated measures. Results revealed a significant interaction (p = .04) in total work output. Post hoc analysis revealed that work significantly declined (–18 ± 51 J) during the second post-supplementation sprint in the P group while being maintained in the R group (–0.0 ± 31 J). No significant interactions were observed in peak power, average power, torque, fatigue index, lactate, ammonia, glucose, or uric acid. Results indicate that oral ribose supplementation (10 g/d for 5 d) does not affect anaerobic exercise capacity or metabolic markers in trained subjects as evaluated in this study.

Scholars have begun to explore the interplay between the multiple identities within a sport fan’s salience hierarchy, noting fandom may compete with other central roles. Researchers have also recently emphasized well-being outcomes for fans, with increasing focus on physical health. Though sport consumer behavior and health consciousness have concurrently emerged, the social psychological connection between the two is unclear. Thus, we aim to clarify this relationship. We leverage an emerging quantitative approach: polynomial regression and response surface methodology. Our findings indicate individuals who value both fandom and health consciousness (i.e., demonstrate high fan identity and health consciousness congruence) experience identity conflict, with men reporting higher levels of identity conflict than women. Thus, we contribute to literature on the potential negative sides (or challenges) of fan identity. The food and sedentarism common to fan culture appear to prompt psychological turmoil for health-conscious individuals. Fan identity may naturally integrate with other social roles, yet our results indicate fandom and health consciousness are often viewed in conflict.