The dangers of exercising in hot conditions can increase when people compete against each other, according to a new study which says people can ignore vital warning signs. Stuart McDill reports.
01:52
02:02
01:25
00:55
01:54
01:41
01:58
01:07
01:23
01:13
01:50
02:37
01:34
01:49
01:20
01:10
00:52
01:24
01:37
02:05
02:40
00:54
03:04
02:20
01:25
03:30
01:20
01:41
02:01
01:41
02:00
01:28
01:29
01:29
01:49
01:22
01:33
02:58
00:59
02:56
02:17
01:25
00:55
02:13
01:34
00:51
01:04
02:42
01:45
01:16
03:01
03:03
02:12
01:36
00:57
02:02
01:34
01:27
01:53
00:51
05:36
01:52
01:49
01:02
01:19
01:26
02:02
01:54
01:50
04:55
02:34
01:14
01:11
01:19
01:46
01:23
01:49
01:56
01:10
02:49
01:49
02:05
00:56
03:04
00:40
01:02
01:37
01:18
02:56
01:49
01:33
01:09
01:27
01:25
01:33
04:07
01:06
00:53
01:47
00:57