I personally think narrow hand placements are harder for push ups than the wide medium hand placements for push ups. I think that both of the different hand placements uses different muscles, which may be why I feel that the narrow hand placement is harder. Hope I helped!
A bag valve mask (BVM), sometimes known by the proprietary name Ambu bag or generically as a manual resuscitator or "<em>self-inflating bag</em>", is a hand-held device commonly used to provide positive pressure ventilation to patients who are not breathing or not breathing adequately.
B. evolving
it means like if you notice any changes in size, shape or color
