In this episode, we have Dr Timo Rantalainen, who is Research Fellow at the Gerontology Research Center, Faculty of Sport and Health Sciences, University of Jyväskylä, Finland.Dr Rantalainen’s area of expertise pertains to neuromuscular and skeletal systems, specifically skeletal adaptation to mechanical loading and neural control of muscles, with a focus on estimating lower limb loading and bone responsiveness. His current research interests include: 1) the effect of loading on bone geometry, 2) neuromuscular function of muscle, 3) muscle and bone adaptations with age, and 4) the measurement of bone geometry using peripheral quantitative computed tomography (pQCT).---This podcast episode is sponsored by Fibion Inc. | The New Gold Standard for Sedentary Behaviour and Physical Activity MonitoringLearn more about Fibion: https://fibion.com/research---Physical Activity Researcher Podcast have created a ‘Purchase Guide for Researchers: Accelerometer-based Activity Trackers’. You can download it from here.---Timestamps:02:00 Funding, success rate and part of luck in the process04:20 Physical state prediction from physical activity13:40 Activity parameters indicative of problems in rehabilitation16:35 Complexity of gait and cognition17.30 Dual task paradigm - simple way of detecting early Alzheimer’s19:30 Variability of gait as indicator of health20:15 Dual task and variability of gait21:13 Exerting hard and thinking23:20 Dual task paradigm during pedalling24:45 Advantages of using ergometer compared to gait25:40 Analysis of accelerometers on thorax and thigh32:10 Relativity of activity intensity classification35:00 Histogram analysis of physical activity36:45 Absolute accelerations as predictors37:50 Why walking is such important to study41:40 Static posturography43.10 Heart rate variability and arrythmias43.50 Variability of walking45.10 How to detect the walking from accelerometer signal56.30 Counts and proprietary algorithms57.40 How to test whether accelerometer you use have been calibrated?