I don't think bowlers are training correctly, there is a lot of emphasis and too much importance only on guys lifting heavy weights. I don't support resting fast bowlers for long. To be a good fast bowler, one has to keep bowling and not rest. "Lee also blamed the benign Indian pitches that has led to a drastic dip in quality of fast bowlers in sub-continent. "The other reason could be the wickets... you got to encourage fast bowlers to run in and bowl quick.
Source: Times of India September 19, 2016 15:45 UTC