Rock 'n Roll Handlebars for Extra Arm Power
Channel: Simon Farthing
Date: 2018-01-09

Uphill one can pull the handlebars very hard to climb better. Generally  the armpower is more than doubled by pulling now as well as pushing  before.  Now all muscles in the arms and stomach and back muscles are exercised.   http://econologica.org/p2017.html for more infor