A franchise of gyms in London use energy-generating spin bikes to give electricity back to the grid. It's just one of the ways that daily exercise can incorporate eco-friendly behaviour - as Katie Gregory has been finding out.
02:31
02:06
00:55
01:35
01:32
01:53
01:07
01:56
01:55
01:34
00:55
01:52
01:19
02:02
01:35
01:41
01:19
01:19
01:29
01:52
01:52
01:52
00:47
01:44
02:15
02:15
01:29
00:41
00:55
01:19
01:33
02:12
01:50
00:45
02:35
00:31
00:31
01:28
01:57
02:02
01:04
00:55
01:19
01:19
01:52
01:29
01:27
01:15
00:49
00:35
01:36
01:34
01:15
01:05
01:35
02:16
01:31
00:59
01:24
01:14
02:31
01:30
03:07
00:45
01:26
00:51
01:46
01:31
02:57
01:26
01:04
01:49
01:05
01:15
01:53
01:56
01:23
04:54
01:24
01:13
01:19
01:41
01:00
00:40
01:46
00:55
00:31
01:45
00:58
00:38
00:45
01:06
01:16
01:01
01:17
00:54
00:51
01:24
01:36
01:04
02:04
02:07
01:48
02:03
01:43
02:01
01:31
01:08
00:54
01:14
01:19
01:33
01:37
01:48
01:38
00:47
03:31
01:08
00:49
02:14