Comparing 3-week vs 6-week Zone 2 blocks—what the research suggests, and why do some coaches swear by one over the other, while others claim its all just a bunch of hooey.
Ive been digging through the research and Im more confused than a lost tourist in a foreign city. Some studies suggest that a 3-week Zone 2 block is sufficient for building aerobic endurance, while others claim that a 6-week block is necessary to see significant gains. But whats the real difference here? Is it just a matter of more being better, or is there some sort of tipping point where the benefits of Zone 2 training start to diminish?
Ive also come across some coaches who claim that a 3-week block is better for avoiding burnout and preventing overtraining, while others say that a 6-week block is necessary to build the kind of endurance needed for longer events. But what does the research really say? Is there any evidence to support these claims, or is it all just anecdotal nonsense?
And then theres the issue of periodization. Do you really need to alternate between Zone 2 blocks and high-intensity interval training (HIIT) to see optimal gains, or can you just stick with Zone 2 training all year round? Ive seen some coaches who swear by a Zone 2-only approach, while others claim that this will lead to stagnation and boredom.
So, whats the verdict? Is a 3-week Zone 2 block enough, or do you need to go for the full 6 weeks? And whats the best way to periodize your training to avoid burnout and prevent overtraining? Im curious to hear what the experts have to say on this topic.