Liposarcoma is a comparatively rare type of cancer. If the parent's hypothesis is: "less exercises == higher weight == more cells == (more mitosis / mutagenic

Liposarcoma is a comparatively rare type of cancer. If the parent's hypothesis is: "less exercises == higher weight == more cells == (more mitosis / mutagenic potential) == more cancer" Which tissue type is accounting for most of the weight difference (in equal height people) who do and don't exercise? You could even reverse this and look at body builders with greater muscularity than average. The number of cells itself is clearly not the cause of increased cancer risk, because neither fat nor muscle cells cause the most common cancers.