Dolecińska D, Przywarska I, Podgórski T, Dylewicz P, Lewandowski J. Use of the six-minute walk test in exercise prescription in male patients after coronary artery bypass surgery.
KARDIOCHIRURGIA I TORAKOCHIRURGIA POLSKA = POLISH JOURNAL OF CARDIO-THORACIC SURGERY 2020;
17:183-188. [PMID:
33552181 PMCID:
PMC7848618 DOI:
10.5114/kitp.2020.102340]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 10/24/2020] [Indexed: 11/24/2022]
Abstract
INTRODUCTION
It is unclear whether it is possible to determine the training load on the basis of the 6-minute walk test (6-MWT) in patients after cardiac surgery with low tolerance of physical exercise.
AIM
Use of the 6-MWT to determine an individual initial training load in walking training on a treadmill in the early phase of cardiac rehabilitation in men after coronary artery bypass graft (CABG) surgery.
MATERIAL AND METHODS
Twenty-two men aged 54 to 74 years, up to 3 months after CABG surgery participated in walking training on a treadmill (12-15 sessions). Patients underwent the initial and final treadmill exercise stress test (TEST) and the 6-MWT. Based on 6-MWT results, the initial training load was prescribed. Before the 6-MWT and 3 minutes after its completion, lactate concentration was determined.
RESULTS
The 6-MWT distance increased from 420 ±80 m to 519 ±61 m (p < 0.001), and the energy expenditure from 4.4 ±1.4 MET to 6.3 ±1.3 MET (p < 0.001). There was a positive correlation between 6-MWT distance and energy expenditure in the TEST before rehabilitation (r = 0.60, p = 0.005), and after rehabilitation (r = 0.75, p < 0.001). A negative correlation was found between the baseline 6-MWT distance and distance increment in the final 6-MWT (r = -0.66, p = 0.002). The 6-MWT did not induce hyperlactatemia.
CONCLUSIONS
The 6-MWT can be used in exercise intensity prescription, especially for determining the individual initial training load, load progression, as well as its correction during follow-up tests.
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