1. exert (oneself) excessively and go beyond one's strength
; - Example: "don't overexert yourself when exercising!"
The Collaborative International Dictionary of English v.0.48:
Overexert \O`ver*ex*ert"\, v. t.
To exert too much.
Moby Thesaurus II by Grady Ward, 1.0:
45 Moby Thesaurus words for "overexert":
carry too far, exaggerate, exhaust, go overboard, go to extremes,
go too far, haul, heave, know no bounds, overact, overcarry,
overdevelop, overdo, overdrive, overelaborate, overemphasize,
overexercise, overexpend, overextend, overindulge, overlabor,
overplay, overreact, overspend, overstrain, overstress, overstudy,
overtask, overtax, overtrain, overuse, overwork, pass all bounds,
press, protest too much, pull, rack, strain, strain every nerve,
stress, stretch, sweat blood, tax, tense, tug