Participants
congenital heart disease
VARICOSE VEINS, DEEP VEIN THROMBOSIS
A total of 30 participants from hospitals and rehabilitation institutions in Beijing who had undergone ACLR surgery were screened by completing the Physical Activity Readiness Questionnaire (PAR-Q) portion of the Physical Activity Questionnaire.
Inclusion criteria: participants aged 18–40 years who underwent fork reconstructive surgery and were reconstructed using an autologous tendon graft, were beyond 8 weeks after reconstructive surgery, and had an active flexion motion of 100° on the operative side of the knee.Exclusion criteria: participants with a history of deep vein thrombosis, pregnancy, congenital heart disease, varicose veins, or contraindications to exercise.During the 8-week experiment, seven participants withdrew from the study for physical, work, and other reasons, leaving 23 participants who completed the final experiment and were included in the statistical analysis. The basic information of the 23 participants is shown in Table 
Group Characteristics (mean ± sd)