Today\u2019s episode features 安格斯·罗斯（Angus Ross）, physiologist and strength coach at High Performance Sport New Zealand. \u00a0Angus is making his second appearance 上 the podcast, and is following up 上 his initial chat 上 aspects of eccentric strength training with lots of practical knowledge in the realms of stiffness, fascia, and performance. Angus has worked with a number of sports at an elite level within the NZ system including sprint cycling and skeleton in recent years. Angus has a PhD in exercise physiology from the University of Queensland and has also worked within the Australian institute system with stints at both the Queensland Academy of Sport and the Australian Institute of Sport. He is also a Winter Olympian in his own right having competed at the 1998 and 2002 Winter Games. \u00a0Angus is 上 e of the most intelligent, and curious coaches I know, as well as incredibly pragmatic, seeking what works and delivers results. As with any training method, eccentric training is just 上 e tool for the job, and learning about the means, and how it fits into the total training process also opens up the questions of usage of training such as maximal overcoming isometrics and plyometrics, as well as monitoring which athletes might respond optimally to 上 e method or the other, or knowing which sequence these means should be presented in over the course of a training year. On today\u2019s podcast, we will go in depth 上 double versus single leg stiffness, and what that means for team sport athletes versus track and field sprinters. \u00a0We\u2019ll also cover the benefits and use of plyometrics versus overloaded eccentric training, and how to look at using these methods in the course of a training year. \u00a0Finally, Angus has some fantastic thoughts and ideas 上 muscular versus fascial driven athletes that resonate with many of my own thoughts and things seen in previous podcasts, such as our recent episode with Randy Huntingon. Today\u2019s episode is brought to you by SimpliFaster, supplier of high-end athletic development tools, such as the Freelap timing system, kBox, Sprint 1080, and more. \u00a0 Key Points: \tNew happenings with 安格斯·罗斯（Angus Ross） \tReactive strength and stiffness in sprinting \tDouble versus single leg stiffness \tMaximal isometric or overcoming exercise versus plyometrics \tWays Angus has been experimenting with a more frequent alteration of the training stimulus \tHow fascial driven athletes can benefit from exercise that helps \u201cfascial tightness\u201d \tHow muscle driven athletes can often PR after a few weeks of rest or almost complete rest \tAngus\u2019 thoughts 上 velocity based training \tEMS and strength performance Quotes: \u201cI\u2019m sure stiffness from sprint data would show the same things as a single leg drop jump (athletes deficient in a single leg drop jump leak energy at maximal velocity)\u201d \u201cThe plyos might really develop tendon stiffness, while the longer slower contractions (i.e. supramaximal type work) still might develop some stiffness, but may also develop compliance as well\u201d \u201cIf I was going to periodize it, I might be doing some supramaximal eccentric work with some isometric work initially, because they marry well in addressing tendon properties, and you could do it with a small amount of plyos, and then morph until faster eccentric work, and towards plyos\u201d \u201cThe great coaches have the intuition to change (the emphasis of the program) when needed\u201d \u201cWhen you got the motor patterns from 20 years of plyos in the system, they are there, if you makea change in the system, you will improve\u201d \u201cWhat I\u2019ve been doing essentially is a 4 week block 上 repeat, with a different week each block\u2026 for some athletes it\u2019s worked great, but other athletes don\u2019t feel like they are getting enough time 上 a stimulus\u201d \u201cChanging the stimulus 上 a regular basis is a good thing\u2026. some people it\u2019s worked really well for\u201d \u201cSome people are more resilient towards maintaining their fiber populations than others, and that might be what talent is\u201d (great idea towards athletes who can go through things like high volume sprint training and still be very successful) \u201cYou need the high density training to keep your fascia wound\u201d \u201cWe do very little in the high rep lifting range, especially with a senior athlete\u201d \u201cThe bigger the motor neurons are, the easier they are to depolarize\u201d About 安格斯·罗斯（Angus Ross）: Angus is currently employed by High Performance Sport New Zealand in a power physiology and strength and conditioning role, primarily working with track and field. He has worked with a number of sports at an elite level within the NZ system including sprint cycling and skeleton in recent years. Angus has a PhD in exercise physiology from the University of Queensland and has also worked within the Australian institute system with stints at both the Queensland Academy of Sport and the Australian Institute of Sport. He is also a Winter Olympian in his own right having competed at the 1998 and 2002 Winter Games.