.... but for power-endurance type fitness is using a rowing machine (on non climbing days) a good idea,....
Using a Campus board will enable you to develop the following vital components of climbing performance:- Contact finger strength (the ability to latch a hold at speed)- Isometric ('hanging') finger strength (at a variety of different finger grips or angles)- Explosive upperbody power (the ability to pull-up very fast and slap for the next hold)- Neuromuscular timing. (the ability to control and synchronise the firing of relevant muscles)- Short term power endurance (if exercises are performed for durations of 40-60 seconds)
So doing long campus routines might be the way to go if your body can take it.
Rather than building up masses of power, this should increase the lactate threshold of the muscles meaning you can fight off pump for longer