Cautions about Eccentric Training
1) Always train with a partner, as you may be pushing past failure, or using weights that are greater than your 1-rep max, in case you reach failure earlier than expected.
2) Slowly increase the weight if you are lifting beyond your 1-rep max. Although many studies have found you are as much as 30% stronger eccentrically, don’t just assume you can safely use this.
3) Use negative repetitions sparingly. This training is taxing on your central nervous system as well as your muscles, so make sure your body feels adequately recovered before training with negatives again.
4) Always warm up before completing any resistance training to increase blood supply to the muscles being used, and to help lubricate your joints for better flexibility and range of movement!