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| Name | Class |
|---|---|
| University of Alcala | OTHER |
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Introduction: Several studies have evaluated and confirmed the ergogenic effect of acute caffeine intake on sports performance, specifically on strength and power performance. However, little is known about the prolonged effects of this supplement on neuromuscular adaptations to strength training.
Objectives: The present study aims to analyze the effects of acute and chronic caffeine intake on neuromuscular adaptations to strength training, according to sex (men vs. women) and type of exercise (bench press vs. squat), as well as fatigue perception, mood state, and potential side effects in older adults.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Caffeine - Males | Experimental |
| |
| Placebo - Males | Placebo Comparator |
| |
| Caffeine - Females | Experimental |
| |
| Placebo - Females | Placebo Comparator |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Caffeine + Resistance exercise | Dietary Supplement | Acute caffeine intake (3 mg/kg) prior each resistance training session of a 8 weeks training program. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Mean velocity at different %1RM | Measuring bar mean velocity desplacement during bench press and back squat exercises. | Through study completion, an average of 12 weeks |
| Peak velocity at different %1RM | Measuring bar peak velocity and time to reach peak velocity of bar desplacement during bench press and back squat exercises. | Through study completion, an average of 12 weeks |
| Mean power output at different %1RM | Measuring during bench press and back squat exercises. | Through study completion, an average of 12 weeks |
| Peak power output and time to reach peak power output at different %1RM | Measuring during bench press and back squat exercises. | Through study completion, an average of 12 weeks |
| Number of repetitions performed at 65%1RM until task failure | In bench press and back squat exercises | Through study completion, an average of 12 weeks |
| Bar velocity deplacement performed in 1 set at 65%1RM until task failure | In bench press and back squat exercises | Through study completion, an average of 12 weeks |
| Power output generated in 1 set at 65%1RM until task failure | In bench press and back squat exercise | Through study completion, an average of 12 weeks |
| Measure | Description | Time Frame |
|---|---|---|
| Fat mass | Using electrical bioimpedance and untrasound in the quadriceps muscle | Through study completion, an average of 12 weeks |
| Fat-free mass | Using electrical bioimpedance and untrasound in the quadriceps muscle |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Facultad de Medicina y Ciencias de la Salud. Universidad de Alcalá | Alcalá de Henares | 28805 | Spain |
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| ID | Term |
|---|---|
| D002110 | Caffeine |
| ID | Term |
|---|---|
| D014970 | Xanthines |
| D000470 | Alkaloids |
| D006571 | Heterocyclic Compounds |
| D011688 | Purinones |
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Randomized controlled trial
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| Placebo + Resistance exercise | Dietary Supplement | Acute placeb intake (3 mg/kg of maltodextrin) prior each resistance training session of a 8 weeks training program. |
|
| Resting Metabolic Rate (RMR) | Kcal at rest (RMR) using a metabolic chart. | Through study completion, an average of 12 weeks |
| Maximal Fat Oxidation Rate (MFO) | g/min (MFO) using a metabolic chart. | Through study completion, an average of 12 weeks |
| Through study completion, an average of 12 weeks |
| Physical activity (METs-min/wk) | Using IPAQ | Through study completion, an average of 12 weeks |
| Dietary (g/kg of macronutrients) | Using a 24-total recall | Through study completion, an average of 12 weeks |
| Mood state | Mood. Participants graded a set of 29 items related to the mood on a Likert scale from 0 (not at all) to 4 (extremely) in reply to the question;How do you feel at this moment?; to assess six scales: tension, depression, anger, vigor, fatigue and confusion. | Through study completion, an average of 12 weeks |
| Adverse effects | Adverse effects. perception of power, endurance, energy and exertion, as well as heart, muscular and gastrointestinal discomfort. | Through study completion, an average of 12 weeks |
| D011687 |
| Purines |
| D006574 | Heterocyclic Compounds, 2-Ring |
| D000072471 | Heterocyclic Compounds, Fused-Ring |