Rolf Nidergerke (30 April 1921 – 27 December 2011) was a German physiologist and physician, and one of the discoverers of the sliding filament theory of muscle contraction.
He and Andrew Huxley, complimenting the independent works of Hugh Huxley and Jean Hanson, revealed that muscle contraction is due to shortening of the muscle fibres.
He studied medicine throughout the Second World War, and obtained his MD degree as the war ended in 1945.
After a brief practise in his hometown, he chose a research career.
He became associated with Huxley, whom he joined at Cambridge University.
Together they published a landmark paper in Nature in 1954, which became the foundation of muscle mechanics.