Is Canelo genetically unable to increase his stamina?

He always has issues no matter what it seems, he trained for three months for the GGG fight and still gassed. Meanwhile GGG at 35 set a tempo Canelo struggled to keep up with. Maybe he's mostly a fast twitch muscle guy? Most of the fighters with good stamina tend to have a moderately sized musculature, i.e. not too bulky, GGG, Floyd, Margarito have stringy physiques with a mix of slow and fast twitch muscle fibres. Is Canelo one of these guys? http://www.dailymail.co.uk/sciencetech/article-2308940/Marathon-running-Its-genes-How-fifth-lack-right-make-compete-long-distances.html Professor Timmons said: ‘From our work, we know that 20 per cent of people do not respond at all to training and in fact can get worse. They push themselves as hard as everyone else, but their muscles do not extract the same amount of oxygen. He told The Sunday Telegraph: ‘It is plausible that by pushing it though training, they get a maladaptation. What is clear is that there is no one recipe that fits all. ‘These low aerobic responders would be better going to the gym to build up their strength and muscle tissue or taking up other competitive sports like martial arts or strength related sports.' The test looks at genes which remodel muscle fibres to allow small blood vessels to grow in between and carry oxygen to the muscles during exercise. The research by Loughborough University was released a week before the London Marathon 2013 The research by Loughborough University was released a week before the London Marathon 2013 Those that have the right combination of these genes can respond to regular intense aerobic exercise such as long distance running. The 20 per cent who are ill-suited to marathon training have genes that do not remodel effectively under regular high intensity training their body’s ability to get oxygen to their muscles can even be reduced, resulting in a reduction in performance.