Direct answer: In the extensor chair, adjust the seat according to the equipment, align the knee to the indicated axis and keep the trunk supported. Do the extension with control and return without dropping the load. Resistance and amplitude should be suitable for its execution and condition.
Adjust before loading
The roller must support the leg in the position indicated by the manufacturer without pressing the foot. Check backrest, locks and hand restraints. Different machines require different adjustments; ask for guidance on site if you do not know where the shaft and supports should be.
Watch Repeat
Keep in touch with the seat and avoid lifting the hip to finish a load that you do not control. The lap is part of the exercise. Changing the amplitude to complete more repetitions changes the record and can hide a charge above what you can perform in the expected pattern.
Use in program for a purpose
The extensor can complete the work of quadriceps or occupy a priority position according to the evaluation. If knee pain arises, interrupt that execution and report the symptom. Persistent pain or accompanied by swelling deserves evaluation instead of a random machine change.
What to record and discuss
- Adjust seat and roll before starting.
- Test a light sets and keep your hips on.
- Log the settings to repeat in the next sessions.
Questions about this topic
Can I do one-sided?
Should I continue if my knee hurts?
References and further reading
Educational content. Examples need adaptation to your experience, routine and health context.