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May 15, 2006Clinical Science

Effect of acetazolamide on leg endurance exercise at sea level and simulated altitude

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Why the study?

Does acetazolamide impair muscle endurance at sea level and simulated altitude?

Population

6 subjects, mean age 20+/-1 years

Comparison

Acetazolamide 250 mg orally three times a day… vs Placebo orally three times a day for 2 days

Design

RCT, double-blind

Follow-up

4 weeks

Key result

Acetazolamide impaired endurance performance at sea level (36 vs 48 min, P<0.05) but not at simulated altitude (20 vs 17 min, P=NS).

Authors

CFCharles S. FulcoSMS. R. MuzaDDDan T. Ditzler

Discussion

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Overview

Caution against acetazolamide for sea-level endurance exercise; extends evidence of altitude-specific performance preservation in this RCT.

Study Design

Type

RCT (n=6)

Blinding

Double-blind

Structured PICO

Does acetazolamide impair muscle endurance at sea level and simulated altitude?

P
Population
6 subjects (mean age 20 years) performing exhaustive constant work rate one-leg knee-extension exercise at sea level and simulated altitude.
I
Intervention
Acetazolamide 250 mg orally three times a day for 2 days
C
Comparator
Placebo orally three times a day for 2 days
O
Outcome
Endurance performance (time to exhaustion during constant work rate one-leg knee-extension exercise at 25+/-2 W) at sea level and simulated altitude (4300 m)surrogate

Main Result

Absolute Event Rate: 36% vs 48%

p-value: p=<0.05

Acetazolamide impairs endurance exercise performance at sea level but not at simulated altitude, likely because the resulting metabolic acidosis is offset by a ventilatory-induced increase in arterial oxygen saturation at altitude.

Cite This Study

Fulco et al. (2006) reported an RCT. Acetazolamide vs. Placebo was evaluated on Endurance performance at sea level (minutes) (p=<0.05). Acetazolamide impaired endurance performance at sea level (36 vs 48 min, P<0.05) but not at simulated altitude (20 vs 17 min, P=NS).

synapsesocial.com/papers/6a3337286b65369c445e8208https://doi.org/10.1042/cs20050233
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