Lamberts R.P., Mann T.N.C., Rietjens G.J., Tijdink H.H.
Div. of Orthopaedic Surgery, Stellenbosch University, Tygerberg, South Africa; UCT/MRC Research Unit for Exercise Science and Sports Medicine, University of Cape Town, Newlands, South Africa; Dept. of Human Physiology and Sport Medicine, Vrije University, Brussels, Belgium; Dept. of Physiotherapy, Saxion University of Applied Sciences, Enschede, Netherlands
Lamberts, R.P., Div. of Orthopaedic Surgery, Stellenbosch University, Tygerberg, South Africa; Mann, T.N.C., UCT/MRC Research Unit for Exercise Science and Sports Medicine, University of Cape Town, Newlands, South Africa; Rietjens, G.J., Dept. of Human Physiology and Sport Medicine, Vrije University, Brussels, Belgium; Tijdink, H.H., Dept. of Physiotherapy, Saxion University of Applied Sciences, Enschede, Netherlands
Iliac blood-flow restrictions causing painful and "powerless" legs are often attributed to overtraining and may develop for some time before being correctly diagnosed. In the current study, differences between actual performance parameters and performance parameters predicted from the Lamberts and Lambert Submaximal Cycle Test (LSCT) were studied in a world-class cyclist with bilateral kinking of the external iliac artery before and after surgery. Two performance-testing sessions, including a peak-power-output (PPO) test and a 40-km time trial (TT) were conducted before surgery, while 1 testing session was conducted after the surgery. Actual vs LSCT-predicted performance parameters in the world-class cyclists were compared with 82 symptom-free trained to elite male cyclists. No differences were found between actual and LSCT-predicted PPO before and after surgical intervention. However, there were differences between actual and LSCT-predicted 40-km TT time in the tests performed before the surgery (2: 51 and 2: 55 min: s, respectively). These differences were no longer apparent in the postsurgery 40-km TT (2 s). This finding suggests that iliac blood-flow restrictions seem to mainly impair endurance performance rather than peak cycling performance. A standard PPO test without brachial ankle blood-pressure measurements might not be able to reflect iliac blood-flow restrictions. Differences between actual and LSCT-predicted 40-km TT time may assist in earlier referral to a cardiovascular specialist and result in earlier detection of iliac blood-flow restrictions. © 2014 Human Kinetics, Inc.
ankle brachial index; article; athletic performance; bicycle; blood flow; case report; competitive behavior; convalescence; exercise test; heart rate; human; iliac artery; leg; magnetic resonance angiography; male; metabolism; muscle strength; oxygen consumption; pathophysiology; peripheral occlusive artery disease; skeletal muscle; stenosis, occlusion and obstruction; task performance; time; treatment outcome; vascularization; Ankle Brachial Index; Arterial Occlusive Diseases; Athletic Performance; Bicycling; Competitive Behavior; Constriction, Pathologic; Exercise Test; Heart Rate; Humans; Iliac Artery; Lower Extremity; Magnetic Resonance Angiography; Male; Muscle Strength; Muscle, Skeletal; Oxygen Consumption; Recovery of Function; Regional Blood Flow; Task Performance and Analysis; Time Factors; Treatment Outcome