Cycling power-to-weight (W/kg), speed and pace, or swimming pace per 100 m and 100 yd with your SWOLF score.
更新日 検証済みの例：6
250 W at 75 kg is 3.33 W/kg. 30 km/h is 2:00 per km, so 40 km takes 1:20:00.
For cycling, power-to-weight is power in watts divided by body weight in kilograms (W/kg), and speed converts to pace as 3,600 ÷ km/h seconds per kilometre, with the time for a chosen ride distance. For swimming, pace is time ÷ distance × 100, per 100 m and per 100 yd, and SWOLF adds the average strokes per length to the average seconds per length.
Cyclists compare W/kg because it sets climbing speed, and swimmers track SWOLF as a measure of efficiency. A 75 kg rider holding 250 W has 3.33 W/kg, and at 30 km/h a 40 km ride takes 1:20:00. A swimmer covering 400 m in 8:00 in a 25 m pool swims 2:00 per 100 m and, at 18 strokes per length, scores a SWOLF of 48.
W/kg ignores aerodynamic drag, which dominates on flat roads. SWOLF scores are comparable only within the same pool length and stroke-counting method.
照合元：Python 3.8 decimal: 250/75; 250/(75/0.45359237); 3600/30 s/km; 40/30 h
照合元：3600 s/h ÷ 150 s/km = 24 km/h
照合元：Python 3.8 decimal: 480 s/4 = 120 s per 100 m; × 0.9144 per 100 yd; 18 + 480/16
照合元：Python 3.8 decimal: 450 s/5 = 90 s per 100 yd; 450/457.2 m × 100 = 98.4252 s per 100 m; 15 + 450/20
Divide power in watts by body weight in kilograms. A 75 kg rider producing 250 W has 250 ÷ 75 = 3.33 W/kg, or 1.51 W/lb at 165 lb. Riders usually quote W/kg at functional threshold power (FTP), which Allen and Coggan describe as the highest power sustainable for about an hour and estimate as 95 % of the average from a 20-minute test.
SWOLF, from swim and golf, is the number of strokes plus the number of seconds for one pool length, and as in golf a lower score is better. Garmin's example is 15 strokes in 30 seconds, a score of 45. Because it depends on pool length and on how strokes are counted (Garmin counts one per full cycle of the watch arm), scores are comparable only for the same pool and device.
Divide 3,600 by the speed in km/h to get seconds per kilometre: 30 km/h is 120 s, or 2:00 per km, and 24 km/h is 2:30 per km. For pace per mile, divide 5,793.6 by the speed in km/h, because a mile is exactly 1.609344 km: 30 km/h is 3:13 per mile.
Multiply by 0.9144, because 100 yd is exactly 91.44 m. A pace of 2:00 per 100 m (120 s) becomes 109.7 s, about 1:50 per 100 yd. Going the other way, divide by 0.9144, so 1:30 per 100 yd is about 1:38 per 100 m. The yard is defined as 0.9144 m exactly (NIST SP 811).
精度は入力値と計算方法の前提に依存します。十進演算には有効数字50桁を使いますが、推定、数値計算手法、元データの精度はそれより低い場合があります。表示の丸め処理でこれらの制約がなくなるわけではありません。 独立した出典の解答と照合した計算例：6。 例えば、「250 W at 75 kg, 30 km/h for 40 km」はPython 3.8 decimal: 250/75; 250/(75/0.45359237); 3600/30 s/km; 40/30 hと照合しています。
Allen H, Coggan A. Training and Racing with a Power Meter, 3rd ed. VeloPress; 2019 — power-to-weight (W/kg); Garmin Swim 2 owner's manual — swim terminology (SWOLF); NIST SP 811 — 1 yd = 0.9144 m, 1 mi = 1609.344 m exactly.
この計算機には、独立した出典の解答を使った計算例が 6 件あります。テストに組み込まれており、ここでも実行できます。
Running pace per km or mile from distance and time, or finish time or distance from pace, with even splits and Riegel race predictions.
Calories burned by an activity from its MET value in the Compendium of Physical Activities, your body weight and the time spent.
Heart rate zones from your maximum heart rate (220 − age, Tanaka, Gulati for women, or measured) by the Karvonen or percent-of-max method, with a target heart rate.
VO2 max from the Cooper 12-minute run, the Rockport 1-mile walk or the resting heart-rate ratio, rated against Cooper Institute norms for age and sex.
One-rep max (1RM) from a set of reps with the Epley, Brzycki, Lombardi and O'Conner equations, plus training loads from 50 % to 100 %.
Steps to distance in km and miles from a step length based on your height or measured, with walking time and calories from the ACSM equation.