High repetition resistance training also
increases the capillary density within your muscles, more so than heavy weight, low repetition training.
However, they did note a progressive trend across heavy, medium, and light loads for
capillary density to
increase with decreasing load -LRB--8 %, +4 %, +7 %), while
capillaries per fiber displayed a similar, but less convincing tendency (+4 %, +23 %, +18 %).