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Jumper's knee: does exercise decrease pain and increase participation in basketball?

Isometric and isotonic leg extensions program: does either exercise decrease morbidity of patellar tendinopathy in basketball players when performed regularly during a playing season?

Status
Not yet recruiting
Phases
Unknown
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12616000752460
Acronym
POST UP
Enrollment
128
Registered
2016-06-08
Start date
2017-09-01
Completion date
2018-09-01
Last updated
2020-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Brief summary

The impact of patellar tendinopathy is underestimated as many athletes continue to participate with pain that affects performance in games and capacity to train. This study aims to determine if we can change the natural history of pain and impaired performance with exercise;

Interventions

The intervention exercises will be conducted four times per week at participants usual training session with equipment provided by the investigators. Players can do their exercise before or after training. The exercise program will be individualised and delivered electronically to participants with exercise prescription software. the repetitions and sets will be consistent in all participants, the weight will be individualised to each participant and to each leg of each participant to account fo

The intervention exercises will be conducted four times per week at participants usual training session with equipment provided by the investigators. Players can do their exercise before or after training. The exercise program will be individualised and delivered electronically to participants with exercise prescription software. the repetitions and sets will be consistent in all participants, the weight will be individualised to each participant and to each leg of each participant to account for differences in muscle strength. Participants will record on the software the number of times each week they complete the session and the weights that they use for the exercise session. The intervention will be offered for the length of the season, this can vary between 6 and 10 months depending on the competition and the country. Isometric protocol: Participants will complete isometric holds on a leg extension machine. These consist of 5 x 45 second holds at 70% maximum voluntary contraction (MVC) with 2 minutes recovery between holds. Isotonic protocol: Participants will complete the isotonic exercise on a leg extension machine using established protocols (4 x 8 contractions at 70% MVC). The rest period between sets will be 1 minute.

Sponsors

La Trobe university
Lead SponsorUniversity

Study design

Allocation
Randomised controlled trial
Intervention model
Parallel
Primary purpose
Treatment
Masking
Open (masking not used)

Eligibility

Sex/Gender
All
Age
18 Years to 35 Years
Healthy volunteers
Yes

Inclusion criteria

1. Have current or previous patellar tendinopathy 2. Playing basketball at an elite or semi-elite level that will ensure they are training more than 4 times a week. 3. Over 18 years until they are no longer playing at an elite or sub-elite level, this is usually up to 35 years but occasionally players can be older

Exclusion criteria

Insufficient English language ability to understand informed consent and follow study protocol .

Outcome results

None listed

Source: ANZCTR · Data processed: Feb 4, 2026