TY - RPRT TI - Improving physical fitness by exercise training programs. AU - S N Blair AU - J V Chandler AU - D B Ellisor AU - T Langley PY - 1980 DO - 10.1097/00007611-198012000-00018 UR - https://pubmed.ncbi.nlm.nih.gov/7444552/ ID - 7444552 ER -