Per the law of conservation of energy, it takes a specific amount of energy to lift an object of a given weight a given height

That of course leads to another problem for people with super strength… heat dissipation. If someone were to lift something as massive as a train car, the amount of heat generated by that persons muscles would be proportionate to the mass they’re lifting. Unfortunately, they’ll be expending massive amounts of energy, without a proportional amount of surface area, so the potential for heat dissipation is comparatively quite small.

My conclusion: any character with super strength would probably unintentionally also have the human torch’s iconic power. Depending on the character, they may only be able to do this once…