A whole coffee cherry extract containing 200 mg caffeine and 15 mg polyphenols improved time trial performance by 4.6% in trained cyclists, but did not enhance muscle glycogen resynthesis during the 24-hour recovery period .
Researchers tested whether a concentrated coffee cherry extract could do double duty: improve exercise performance and accelerate muscle glycogen recovery in trained cyclists. Twelve elite cyclists (VO2max averaging 55 mL/kg/min) completed two separate testing sessions where they either consumed the coffee cherry supplement or placebo before and after a structured exercise protocol.
The protocol mimicked a real training scenario. Cyclists first performed 30 minutes of steady-state cycling at high intensity (79% VO2max), then immediately completed a 15-minute time trial. The following morning, after consuming carbohydrate with either the supplement or placebo, they completed a second time trial. Blood samples and muscle biopsies tracked what was happening throughout.
The performance result was clear: the coffee cherry extract improved work output during the first time trial by 4.6% compared to placebo (3.14 vs 3.02 kJ/kg, with a Hedge's g effect size of 0.8). This is a meaningful margin in a sport where races are decided by seconds. Cyclists also reported lower perceived exertion during the steady-state cycling phase, despite no differences in how hard their bodies were actually working (measured by respiratory exchange ratio). Plasma caffeine and chlorogenic acid both rose significantly during and after exercise with the supplement, confirming the compounds were absorbed and circulating.
The recovery story was different. Muscle glycogen content increased similarly in both groups over the first four hours (64 mmol/kg with placebo vs 44 mmol/kg with supplement) and from 4 to 24 hours post-exercise (53 mmol/kg placebo vs 45 mmol/kg supplement). While there was a trend toward faster resynthesis with placebo, both groups achieved substantial recovery when paired with 1 gram per kilogram of body weight carbohydrate. The supplement appeared to offer no advantage for glycogen replenishment.
This study distinguishes between two separate questions: can coffee cherry extract improve performance in a single bout of exercise, and can it enhance recovery? The answer appears to be yes to the first and no to the second.
The 4.6% performance gain is consistent with what caffeine research has shown for years. At 200 mg, this dose sits in the middle of the effective range. The polyphenol contribution to that performance boost remains unclear from this single study, though the effect size suggests a real benefit. For trained cyclists, this magnitude of improvement could be race-relevant.
The lack of glycogen resynthesis benefit is important if you're considering this supplement specifically for recovery. Post-exercise carbohydrate intake (1 g/kg) appears to be the dominant factor in muscle glycogen replenishment. The coffee cherry extract did not enhance this process, at least not in the timeframe measured. This doesn't mean the supplement is useless for recovery, only that it doesn't appear to accelerate muscle glycogen storage.
One practical limitation: the study included only 12 participants, with just one female cyclist. Whether these results generalize to female athletes, recreational cyclists, or other sport modalities remains unknown. The coffee cherry extract itself is not widely available under standard supplement brand names, so replicating this exact intervention may be difficult.
If you're looking to improve cycling performance, the fundamentals still matter most: adequate sleep duration, protein at every meal, structured high-intensity interval training, and consistent zone-2 cardio work. Caffeine-containing supplements can enhance performance on top of these foundations, but they don't replace them.
| Parameter | Details |
|---|---|
| Study Type | Double-blind, randomized, placebo-controlled crossover |
| Sample Size | 12 trained cyclists (11 male, 1 female) |
| VO2max | 55 ± 2 mL/kg/min |
| Intervention | Whole Coffea arabica cherry extract: 200 mg caffeine + 15 mg polyphenols |
| Primary Outcome | Time trial work output, muscle glycogen resynthesis |
| Performance Result | 4.6% improvement in time trial work (3.14 vs 3.02 kJ/kg, p < 0.05) |
| Glycogen Result | No significant difference in resynthesis (0-4h: 44 vs 64 mmol/kg; 4-24h: 45 vs 53 mmol/kg) |
| Journal | Journal of the International Society of Sports Nutrition |
| PubMed ID | 42234539 |
| Clinical Trials Registration | NCT05404841 |
1. Study published in the Journal of the International Society of Sports Nutrition. PubMed: 42234539
2. Clinical trial registration: NCT05404841
ProtocolEngine provides general health information based on published research. This is not medical advice. Consult a healthcare professional before starting any supplement or health protocol.