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A training sled including a pair of nonlinear runners of tubular construction arranged in parallel relative to a center axis and a plane. A head crossbar of tubular construction may extend between first ends of the runners and may be joined thereto so as to form a continuous tubular U-shaped member

A training sled including a pair of nonlinear runners of tubular construction arranged in parallel relative to a center axis and a plane. A head crossbar of tubular construction may extend between first ends of the runners and may be joined thereto so as to form a continuous tubular U-shaped member with the runners. A weight bearing member may be affixed to and extend between the pair of nonlinear runners near mid-sections thereof. A rear crossbar of tubular construction may extend between and may be disposed above the plane of the runners proximate second ends thereof and may be joined thereto opposite the head crossbar, so as to present a rearward facing surface against which force may be applied. The training sled may include a removable handlebar in a variety of configurations. A ski accessory may be configured to removably attach to the training sled. The ski accessory may include a pair of nonlinear skis arranged in parallel relative to a center axis and a plane. A friction-reducing layer may be disposed on a bottom portion of each of the pair of skis. A ski head crossbar may extend between head ends of the pair of skis. A ski rear crossbar may extend between rear ends of the pair of skis. Attachment arms may be disposed on an inner portion of each of the pair of skis and may be configured to removably attach to the athletic training sled.

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1. A training sled comprising: a) an upper portion, including: i) a pair of runners arranged in parallel relative to a center axis and a plane;ii) a head crossbar extending between first ends of the runners and joined thereto so as to form a continuous tubular U-shaped member with the runners;iii) a

1. A training sled comprising: a) an upper portion, including: i) a pair of runners arranged in parallel relative to a center axis and a plane;ii) a head crossbar extending between first ends of the runners and joined thereto so as to form a continuous tubular U-shaped member with the runners;iii) a weight bearing portion affixed to and extending between the pair of runners near mid-sections thereof; andiv) a rear crossbar extending between and disposed above the plane of the runners proximate second ends thereof and joined thereto opposite the head crossbar so as to present a rearward facing surface against which force may be applied; andb) a selectively removable modular ski assembly disposed beneath the runners of the upper portion including at least two skis attached to each other by at least one lateral crossbar, the modular ski assembly being removable to permit the training sled to be pushed or pulled on the bottom surface of the runners in a first mode of operation without the removable modular ski assembly, and in a second mode of operation with the removable modular ski assembly attached to permit the training sled to be pulled on the skis. 2. The training sled of claim 1, wherein the selectively removable modular ski assembly includes: a) a friction-reducing layer disposed on a bottom portion of each of the pair of skis to permit the sled to be pulled on a smooth surface;b) a first lateral crossbar extending between the skis near the front end of the ski assembly;c) a second lateral crossbar extending between the skis near the rear and of the ski assembly; andd) a first attachment arm extending upwardly from the ski assembly to urge against the upper portion when the upper portion of the sled is pushed from the back or pulled from the front. 3. The training sled of claim 2, wherein the first attachment arm urges against the weight bearing member when the upper portion of the sled is pushed from the back or pulled from the front. 4. The training sled of claim 3, wherein a plurality of attachment arms are provided that slide over and urge against a forward portion of the weight bearing member when the upper portion of the sled is pushed from the back or pulled from the front. 5. The training sled of claim 1, wherein relative movement between the upper portion and the selectively removable ski assembly is limited at least in part by a removable locking pin. 6. The training sled of claim 5, wherein the removable locking pin is disposed in a plurality of flanges on at least one of the skis near the back of the at least one ski, wherein the locking pin spans across the upper side of the ski and prevents a runner of the upper portion from sliding backwardly out of the ski assembly. 7. The training sled of claim 1, wherein the pair of runners include elongated tubular members having a rounded cross section on a lower face thereof. 8. The training sled of claim 4, wherein the weight bearing member includes a plate attached at first and second ends to the pair of runners for supporting added weight to the training sled. 9. The training sled of claim 8, wherein the weight bearing member further includes a weight horn attached to the plate for receiving a plurality of weight plates. 10. The training sled of claim 2, wherein the friction-reducing layer is a high density carpet-like material. 11. The training sled of claim 1, further comprising: a removable handlebar; anda pair of posts disposed on the second ends of the runners, wherein the pair of posts are configured to removably receive the removable handlebar. 12. The training sled of claim 11, wherein the removable handlebar includes: an attachment crossbar configured to removably mate with the pair of posts disposed on the second ends of the runners; andan upper grip bar having a pair of substantially L-shaped legs, wherein the pair of substantially L-shaped legs are operably connected to the attachment crossbar. 13. The training sled of claim 1 wherein the selectively removable modular ski assembly further includes a first set of rollers disposed proximate to the head ends of the skis; and a second set of rollers disposed proximate to the rear ends of the skis. 14. A training sled comprising: i) a pair of runners arranged in parallel relative to a center axis and a plane;ii) a head crossbar extending between first ends of the runners and joined thereto so as to form a continuous tubular U-shaped member with the runners;iii) a weight bearing portion affixed to and extending between the pair of runners near mid-sections thereof; andiv) a rear crossbar extending between and disposed above the plane of the runners proximate second ends thereof and joined thereto opposite the head crossbar so as to present a rearward facing gripping surface against which force may be applied by a user to push the sled at a first vertical height; andv) a removable modular handlebar attached to the sled proximate the rear crossbar to provide a second gripping surface at a second vertical height different from the first vertical height, the sled being operable in (i) a first mode of operation with the removable handlebar removed to permit a user to push on the rear crossbar at the first vertical height to train a first grouping of muscles, and in (ii) a second mode of operation with the handlebar installed to permit a user to push on the removable handle at the second vertical height to train a second grouping of muscles. 15. The training sled of claim 14, wherein the training sled includes a pair of posts disposed on the second ends of the runners, wherein the pair of posts are configured to removably receive the removable handlebar. 16. The training sled of claim 15, wherein the removable handlebar includes: an attachment crossbar configured to removably mate with the pair of posts disposed on the second ends of the runners; andan upper grip bar having a pair of substantially L-shaped legs, wherein the pair of substantially L-shaped legs are operably connected to the attachment crossbar. 17. The training sled of claim 15, wherein the removable handlebar includes: an attachment crossbar configured to removably mate with the pair of posts disposed on the second ends of the runners;a pair of L-shaped legs operably attached at first ends thereof to the attachment crossbar; anda substantially straight grip bar operably attached to second ends of the pair of L-shaped legs. 18. The training sled of claim 15, wherein the removable handlebar includes: an attachment crossbar configured to removably mate with the pair of posts disposed on the second ends of the runners;a left-flared grip bar having an L-shaped lower portion operably attached to the attachment crossbar;a right-flared grip bar having an L-shaped lower portion operably attached to the attachment crossbar; andan upper crossbar extending between and operably attached to the left-flared grip bar and the right-flared grip bar. 19. The training sled of claim 14, further comprising an anchor provided proximate the head crossbar for receiving at least one of ropes, cables and straps to the training sled. 20. The training sled of claim 14, wherein the handlebar presents a rearward facing surface against which force may be applied in a range from 8 inches to 40 inches above the plane of the runners.