Perceived Temperature For Runners Version 1

Normal heat indexes assume a person walking outdoors at 3 mph and generating 180 watts per square meter of skin. The original work states "higher levels of activity would increase the sensitivity to humidity… few people, however, sustain activity above the level considered here for long enough to reach a steady state". This is not very helpful to runners that are moving far quicker than 3 mph and generating a lot more heat. Ideally, I'd go back to the original perceived temperature work, recreate the mathematical models and plug in different values for the heat generation for runners. Sadly, I've not found an easy way of doing that. Instead, I have taken a simple approach based on the idea that in cold weather, the perceived temperature is about 20f warmer than the actual temperature. The chart below is based on the standard perceived temperature calculation, but with 10f added to the actual temperature. The chart below is a first pass at what running at a given temperature and humidity would feel like to someone walking. So running at 76f and 80% humidity would feel like walking in 100f temperatures.

		Temperature
		70f	72f	74f	76f	78f	80f	82f	84f	86f	88f	90f	92f	94f	96f	98f	100f
Humidity
	40%	80	81	83	85	88	91	94	97	101	105	109	114	119	124	130	136
	45%	80	82	84	87	89	92	96	100	104	109	114	119	124	130	137	143
	50%	81	83	85	88	91	95	99	103	108	113	118	124	131	137	144	152
	55%	81	84	86	89	93	97	101	106	112	117	124	130	137	145	153
	60%	82	84	88	91	95	100	105	110	116	123	129	137	145	153
	65%	82	85	89	93	98	103	108	114	121	128	136	144	153
	70%	83	86	90	95	100	106	112	119	126	134	143	152
	75%	84	88	92	97	103	109	116	124	132	141	150
	80%	84	89	94	100	106	113	121	129	138	148
	85%	85	90	96	102	110	117	126	135	145
	90%	86	91	98	105	113	122	131	141
	95%	86	93	100	108	117	127	137
	100%	87	95	103	112	121	132