F4A1R1T1L1E1K5
14 points
FARTLEK is validvalid
an athletic training technique [n FARTLEKS]
(Swedish) a training technique, used esp. among runners, consisting of bursts of intense effort alternating with less strenuous activity [n -S]
an athletic training technique [n FARTLEKS]
(Swedish) a training technique, used esp. among runners, consisting of bursts of intense effort alternating with less strenuous activity [n -S]