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ThCT NGHIEM CAN LOC Q U A PHAN TICH DANG DI
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I. MAU DANG DI

1. Cac thcfi diem cua chu ky di

Dong tac di la sii tiep dien nhiing cii dong co chu ky cua hai chan. Chu ky tii
khi cham got cua mot chan cho den khi cham got trd lai cua cung chan do diidc

tinh 100% cho toan bo chu ky di. NgUdi ta co the xac dinh nhiing thdi diem dac
biet trong khoang chu ky nay. C) thdi diem 0% cua chu ky di, got cham dat (heel

strike) de bat dau cho giai doan chong (stance phase). Thdi diem 15% cua chu ky
di, mui ban chan tiep xuc vdi nen va diidc goi la “long ban chan bang” (foot flat).

Thdi-diem 30% cua chu ky di,»got rdi khoi nen va diidc goi la “nhac got” (heel off).
Thdi diem 45% cua chu ky di, goi va hong gap de day nhanh chan ra trudc de

chuan bi cho giai doan du (swing phase), va diidc goi la “gap go’i” (bend knee). 0
diem 60% cua chu ky di, ngon chan rdi mat dat, day la thdi diem cham dut giai
doan chong va bat dau giai doan du (swing phase). No diidc goi la "nhac ngon"

(toe off).
r
0 giiia giai doan du, gap liing ban chan lam cho cac ngon chan cach dat.
Khong co mot ty le chinh xac dinh ra trong khoang nay. 0 thdi diem 100%. got
cham dat trd lai. Vi the, thdi gian cho giai doan chong chiem khoang 60% cua toan

bo chu ky va giai doan du chiem khoang 40%.

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