The inconsistent findings in the literature on caffeine
Research gap analysis derived from 3 computer_science papers in our local library.
The gap
The inconsistent findings in the literature on caffeine and performance in combat sports. The limited understanding of the effects of caffeine on performance in different combat sports disciplines. The need for a comprehensive review of the
Evidence profile
Sourced from the discussion and stated research gap and limitations section of the source papers, classified as general, spanning 3 journals.
Research trend
Established — well-defined area with open sub-problems.
Supporting evidence — 4 representative gaps
- Caffeine and physical performance in female intermittent sport athletes: a systematic review and meta-analysis considering menstrual cycle phase (2026) · Frontiers in Nutrition · doi
The present systematic review included nine studies (7, 9, 43–48, 53) and the meta-analysis included a subset of six studies (43–48), reflecting the limited evidence base. Together, these findings highlight a critical gap in the literature, as current study designs lack the methodological rigor required to robustly evaluate menstrual cycle–dependent responses to caffeine in female athletes. Thus, the primary contribu- tion of this review lies not only in synthesizing available evidence, but in demonstrating that current study designs are insufficient to robustly evaluate menstrual cycle–dependent responses to caffeine.
generaldiscussionevidence 5/5Keywords: review included evidence current designs robustly evaluate menstrual cycle dependent responses caffeine present systematic nine - MENSTRUAL CYCLE EFFECTS ON EXERCISE CAPACITY AND TRAINING ADAPTATIONS (2026) · Archiv Euromedica · doi
The influence of the menstrual cycle on exercise capacity and training adaptations remains a subject of ongoing scientific debate. Current findings in this area remain inconclusive. There is a need for further research to fully understand the effects of menstrual cycle phases on exercise capacity and training adaptations in female athletes.
generalstated research gapevidence 5/5Keywords: influence menstrual cycle exercise capacity training adaptations remains - Caffeine and physical performance in female intermittent sport athletes: a systematic review and meta-analysis considering menstrual cycle phase (2026) · Frontiers in Nutrition · doi
The primary limitation lies in highlighting key limitations of the available evidence base. No study conducted both caffeine and placebo conditions in both menstrual cycle phases. Sub-group analyses are intended to guide hypotheses for future sports nutrition and menstrual cycle research, rather than establish causal interaction effects.
generallimitations sectionevidence 5/5Keywords: primary limitation lies highlighting key limitations available evidence - Acute caffeine strategies for improving performance in combat sports: a structured narrative review (2026) · Frontiers in Physiology · doi
The inconsistent findings in the literature on caffeine and performance in combat sports. The limited understanding of the effects of caffeine on performance in different combat sports disciplines. The need for a comprehensive review of the literature to identify the factors that contribute to inconsistent findings.
generalstated research gapevidence 5/5Keywords: inconsistent findings literature caffeine performance combat sports limited
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