question: safety rules:all riders using the 2.0-cable must read and respect your safety rules.
Capitalize this past sentence correctly.
A: SAFETY RULES:All riders using the 2.0-cable must read and respect your safety rules.

question: before felting: approx. 40 cm
Capitalize this past sentence correctly.
A: Before felting: approx. 40 cm

question: the exercise must be felt between your shoulder blades.
Capitalize this past sentence correctly.
A: The exercise must be felt between your shoulder blades.