Dear Diaconu Gabriel,
1. I wonder what is your opinion regarding kettlebells swings, snatches, jerks, or strength lifts (press, turkish getup).
The use of kettelbells as overload instead of barbell in traditional Weightlifting exercises (swings, snatches, jerks) changes their biodynamic structure.
These exercises with kettelbells could be used as general preparation means or for fitness.
2. Can you increase max strength and starting strength using kettlebells?
Yes, if you use the kettkebell exercises in a correct muscle work regime.
For example, the Kettlebell squat jumps are an excellent training means for explosive strength development.
3. What about ligament and connective tissue strength?
I suppose you are talking about the connective tissue solidity.
I usually don’t wish answer in a field where I am not professional, this question has to be indexed to a medical doctor.
Yuri Verkhoshansky