The goal of the study is to find out how mild home exercises (similar to usual care) and progressive strength training, which include neuromuscular exercise, affected knee joint function and HS muscle strength in individuals who has persistent HS muscle strength deficits 12-24 months after ACLR.

The objective of the present study is to investigate whether individuals, who perform supervised progressive strength training including elements of neuromuscular exercise intervention (SNG) will achieve greater improvements in leg muscle power and greater improvements in knee function compared with individuals performing a homebased low-intensity weight-bearing exercise protocol. We hypothesize that supervised progressive strength training would be superior to a homebased low-intensity weight-bearing exercise protocol for regaining muscle strength and knee function. This study will impact society by promoting health, reducing healthcare costs, supporting productivity, and contributing to a more active and engaged community. Limited investigation exists regarding the durability of progressive resistance exercises in mitigating hamstring deficits post-ACL reconstruction and the personalized optimization of exercise protocols for individual athletes. Further exploration is needed for sustained benefits and tailored rehabilitation strategies.

Inclusion Criteria:

• Age between 18 - 30 years
• 12-24 months post-surgery (ACL reconstruction)
• Persistent maximal isometric knee flexor strength asymmetry (>10% leg-to-leg the difference, in the isometric testing angle of 90° knee flexion)

Exclusion Criteria:

• Body mass index [BMI] more than 35
• known lower limb pathology (including previous and/or concomitant knee injuries requiring surgical intervention to either knee)