Reactiv is led by Coach Alfred, who has been coaching for more than 15 years. We specialized in Sprints and Hurdles. Our holistic approach in training has provided the athletes with a conducive environment to focus on their training. This includes mental skills, basic sports nutrition guides, injury prevention, and sports massage.

Wave Sky 3-17


Our Founder 

Alfred Sim



Alfred is driven by an unwavering determination to achieve his dreams and is also personally committed to every athlete’s training and development.



Record Breaking Athletes


One of the most promising junior sprinters Calvin Kang broke the National Junior Record in the Asian Junior Championships 2008, surpassed the performances of senior athletes, and went on to represent Singapore in sprints at the Beijing Olympics 2008 and recently Asian Games 2010 in Guangzhou, 4 x 100m relay quartet.


Abdul Hakeem held the National Junior Record for 110m Hurdles since 2006, but within 12 months of training with Alfred, he went on to break the 42-year-old National Record for 110m Hurdles. ​


Shalindran Sathiyanesan broke the championship record for the A Division Boys 400m event at the 49th Inter-school Track & Field Championships 2008 with a time of 49.35 seconds. 


Most recently, Joshua Lim of Anglo-Chinese School (Independent) clocked a record-breaking 49.24 seconds to easily claim the B Division Boys’ 400 meters gold at the 57th National Schools Track and Field Championships 2016.

Qualifications & Awards

Alfred is always ready to take up challenges and upgrade himself – he has already completed his IAAF Level 2 (equivalent to Level 4 in the new system) and NCAP Level 1 coaching courses and completed his Bachelor of Exercise and Sports Science at the Edith Cowan University. He has a strong interest in Strength and Conditioning, and he is also NSCA, CSCS certified.

He was awarded the POSB Everyday Champions Award 2009, organized by POSB and Singapore Sports Council, for his dedication and outstanding achievement in coaching. The SSC also awarded him a High-Performance Coaches Scholarship in 2009, to further upgrade himself, by encouraging him to participate in workshops, seminars, and conferences.


Alfred was the Apprentice Coach for the National Sprints and Hurdles Team. He was also the former SA Coach Assistant in Sprints and Hurdles, in charge of the Youth and Junior Development Team, and also plays the role of Team Manager and Team Coach, leading athletes to several international meets, such as the World Youth and World Junior Championships in Ostrava and Poland.Regionally, he has also led teams to Asian Junior Championships in Jakarta, and SEA Junior Championships in Phuket. Recently 2 of his athletes that he coached were selected to represent in the SEA Youth Athletics Championships 2012 held in Singapore.


33 Yio Chu Kang Rd, Singapore 545677

8770 8802