Strength calibration
A resistance force is controlled such that a user's effort against the resistance force results in a first isokinetic seed movement, wherein the user is an exercise machine user using an exercise machine. The resistance force required to effect the first isokinetic seed movement is associated with a predetermined force-velocity profile. A strength determination of the user is made based at least in part on the required resistance force and the associated predetermined force-velocity profile.
1. A method, comprising:
controlling a resistance force such that a user's effort against the resistance force results in a first isokinetic seed movement, wherein the user is an exercise machine user using an exercise machine, at least in part by dynamically changing the resistance force to match the user's applied force, while allowing the user to move the exercise machine at a prescribed constant speed;
associating a resistance force required to effect the first isokinetic seed movement, with a predetermined force-velocity profile, wherein the predetermined force-velocity profile is based at least in part on statistical modeling techniques with other users; and
making a strength determination of the user based at least in part on the required resistance force and the associated predetermined force-velocity profile.
2. The method of claim 1 , wherein the strength determination comprises a one rep max.
3. The method of claim 2 , wherein the one rep max corresponds to a point along the force-velocity profile with a close to zero velocity.
4. The method of claim 1 , further comprising controlling a second resistance force such that the user's effort against the second resistance force results in a second isokinetic seed movement.
5. The method of claim 4 , wherein speed is dropped between the first resistance force and the second resistance force.
6. The method of claim 4 , further comprising: controlling a third resistance force such that the user's effort against the third resistance force results in a third isokinetic seed movement.
7. The method of claim 6 , further comprising associating at least in part a best isokinetic seed movement from the first isokinetic seed movement, second isokinetic seed movement, and third isokinetic seed movement in making the strength determination.
8. The method of claim 1 , wherein each isokinetic seed movement comprises at least one of the following: a lower body movement, a pushing upper body movement, a pulling upper body movement, and a core movement.
9. The method of claim 1 , wherein the resistance force is along a cable.
10. The method of claim 1 , wherein the predetermined force-velocity profile is based on previous measurements of a plurality of test subjects.
11. The method of claim 1 , wherein the strength determination of the user corresponds to a specific exercise.
12. The method of claim 11 , further comprising extrapolating the strength determination of the user to a second exercise.
13. The method of claim 1 , wherein each isokinetic seed movement comprises using the exercise machine to dynamically change resistance to match the user's applied force, while allowing the user to move the resistance at a prescribed constant speed during a concentric phase.
14. The method of claim 1 , wherein the prescribed constant speed is between 20 and 60 inches per second.
15. The method of claim 1 , wherein each isokinetic seed movement comprises at least one of the following: a seated lat pulldown, a seated overhead press, a bench press, and a neutral grip deadlift.
16. The method of claim 1 , wherein the strength determination comprises a recommended starting weight for multiple repetitions of a first non-isokinetic seed movement associated with the first isokinetic seed movement.
17. The method of claim 16 , wherein the strength determination further comprises a recommended starting weight for multiple repetitions of another non-isokinetic seed movement.
18. The method of claim 1 , further comprising updating the strength determination based at least in part on user performance on a non-isokinetic seed movement.
19. An exercise machine, comprising:
a processor configured to:
control a resistance force such that a user's effort against the resistance force results in a first isokinetic seed movement, at least in part by dynamically changing the resistance force to match the user's applied force, while allowing the user to move the exercise machine at a prescribed constant speed;
associate a resistance force required to effect the first isokinetic seed movement, with a predetermined force-velocity profile, wherein the predetermined force-velocity profile is based at least in part on statistical modeling techniques with other users; and
making a strength determination of the user based at least in part on the required resistance force and the associated predetermined force-velocity profile; and
a memory coupled to the processor and configured to provide the processor with instructions.
20. A computer program product, the computer program product being embodied in a non-transitory computer readable storage medium and comprising computer instructions for:
controlling a resistance force such that a user's effort against the resistance force results in a first isokinetic seed movement, wherein the user is an exercise machine user using an exercise machine, at least in part by dynamically changing the resistance force to match the user's applied force, while allowing the user to move the exercise machine at a prescribed constant speed;
associating a resistance force required to effect the first isokinetic seed movement, with a predetermined force-velocity profile, wherein the predetermined force-velocity profile is based at least in part on statistical modeling techniques with other users; and
making a strength determination of the user based at least in part on the required resistance force and the associated predetermined force-velocity profile.