What question did this study set out to answer?

To evaluate the myocardial stress response and assess potential structural cardiac damage in professional road cyclists after strenuous competition.

October 1, 2003Medicine & Science in Sports & Exercise

Myocardial Stress after Competitive Exercise in Professional Road Cyclists

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Why the study?

Does strenuous competitive physical exercise cause structural myocardial damage or stress in professional road cyclists?

Population

11 highly trained male professional road cyclists

Comparison

One stage of a 5-day professional cycling race vs Pre-exercise baseline

Design

Cohort

Follow-up

Immediately after one stage of a 5-day race

Authors

DNDANIEL K NIGInternational Organization for Migration YSYORK OLAF SCHUMACHERInternational Organization for Migration LHLothar HeinrichUniversity of Augsburg

Discussion

Member takes

Implication

Reassures no acute damage in elite cyclists; leaves open long-term effects of repeated stress.

Key Points

To evaluate the myocardial stress response and assess potential structural cardiac damage in professional road cyclists after strenuous competition.
Evaluated 11 male professional road cyclists (mean age 27 ± 4 years; peak VO2 67 ± 5 mL·kg⁻¹·min⁻¹) before and after one stage of a 5-day professional cycling race.
Performed cardiac examinations including resting echocardiography and stress electrocardiography.
Measured pre- and post-race serum biomarkers: brain natriuretic peptide (BNP), high-specificity cardiac troponin T (cTnT), creatine kinase (CK), CKMB, myoglobin, and urea.
Clinical cardiac examinations revealed no pathological changes, and post-exercise cTnT remained normal despite significant increases in skeletal muscle markers CK (P < 0.01), CKMB (P < 0.05), and myoglobin (P < 0.01).
BNP concentrations rose significantly from 47.5 ± 37.5 pg·mL⁻¹ pre-exercise to 75.3 ± 55.3 pg·mL⁻¹ post-exercise (P < 0.01).
Pre-exercise BNP, post-exercise BNP, and exercise-induced BNP increases correlated significantly with athlete age (R² = 0.68, R² = 0.66, and R² = 0.58, respectively; P < 0.05).

Structured PICO

Does strenuous competitive physical exercise cause structural myocardial damage or stress in professional road cyclists?

Population

11 highly trained male professional road cyclists (age 27 +/- 4 yr; VO2peak 67 +/- 5 mL.kg-1.min-1; training workload 34,000 +/- 2,500 km.yr-1)

Intervention

One stage of a 5-day professional cycling race (strenuous competitive physical exercise)

Comparator

Pre-exercise baseline

Outcome

Myocardial stress reaction measured by cardiac biomarkers (BNP, cTnT, CK, CKMB, Myo, urea) and echocardiography/stress ECGsurrogate

Strenuous endurance exercise in professional cyclists increases BNP without elevating cTnT, suggesting reversible myocardial stress rather than structural damage.

Limitations

Small sample size
Needs confirmation in larger trials including different intensities, sports, and age groups

Cite This Study

NIG et al. (2003) studied this question.

synapsesocial.com/papers/6a6f6450b5c1fe5ca9df995d https://doi.org/10.1249/01.mss.0000089248.37173.e7

View Full Paper

Ask AI

Bookmark

Myocardial Stress after Competitive Exercise in Professional Road Cyclists

Discussion

Member takes

Implication

Key Points

Structured PICO

Limitations

Cite This Study

Myocardial Stress after Competitive Exercise in Professional Road Cyclists

Discussion

Member takes

Implication

Key Points

Structured PICO

Limitations

Cite This Study

Also Consider

Also Consider