Jan "mindboxer" Sleijfer

Author Mindboxing 🔋 Founder NL sport psychologist 🔋 therapist TCM 🔋 Expert (mental) health & performance

Hoofddorp, North Holland, Netherlands

About

Drs. Jan Sleijfer and his NL-partners help you getting into a winning state of body and mind for your performance – whatever that might be – olympic games, school exams, leadership, strategic thinking and more: 1. SPORT: NLsportpsycholoog® power programme for (elite) athletes 2. SCHOOL: KeikoKidz power programme for self confidence at school 3. WORK: Mindboxing® power programme for resilience at the workfloor 4. LIFE: MeerVitaal.nu power life style programme for more vitality Jan works as an university registered Sport Psychologist (VSPN) and HBO-registered Therapist Complementary & Additive Medicine (TCM-CAM-RBCZ) in the fields of health and performance. Based on scientific research, he applied old Traditional Chinese Medicine to a Dutch way of living and thinking. Connecting the best out of two worlds. Outcome: people perform at their best and stay mentally fit within sports, business and daily life. He developed his own unique power programme called the Three Batteries® method. The result of 20 years of teaching body and mind skills in high risk occupations, guiding elite athletes, practising martial arts and helping people dealing with stress. To improve his own knowledge and skills Jan Sleijfer is continually looking for new developments. The best way to do this is by meeting interesting people, especially by founding the network NL sportpsycholoog. Specialties: Using the best out of two worlds for improving health and peak performance within the field of sports, business and lifestyle (vitality).

Experience

  • Founder at NLsportpsycholoog®
    Jan 2006 - Present · 20 yrs 6 mos

    NL sportpsycholoog® is a network of Dutch sports and performance psychologists. A team of experts that uses psychological knowledge and skills to address optimal performance and well-being of not only athletes, but also applied to organisations.We help to fulfil your potential and serve up success.

  • Author at Mindboxing
    Nov 2021 - Present · 4 yrs 8 mos

    Verander piekeren in pieken, sleur in passie en vermoeidheid in vitaliteit!

  • KEIKO Health & Performance Center (Hoofddorp, The Netherlands)
    • Director and owner
      Jan 2005 - Present · 21 yrs 6 mos

    • Owner
      Jan 2005 - Present · 21 yrs 6 mos

      KEIKO Health and Performance Center is focused on your health and performance, by using a integrative approach. Our Three Batteries® method combines the best in evidence-based (Western) performance psychology with complementary (Eastern) Chinese Traditional Medicine. Whether you are an Olympic athlete, employee, student or recovering patient, our programs help you optimizing your performance and maximize your quality of life and longevity.

  • senior trainer / coach at Department of Justice
    Jan 1993 - Present · 33 yrs 6 mos

    Tutor (sr.) for the professional education of Ministry of Justice Department personnel: Penitentiary workers Ministry of Justice: National Agency Correctional Institutions, The Hague Professional qualifications: 1. Leader on the aggression focus group. 2. Project leader of expertise teams ‘Drug couriers’, ‘Terrorism’, ‘Biometrics’ and others. 3. Coordinator of free-lance trainers and actors used when training personnel. 4. Teacher of various courses, amongst others: · Social Interaction · Presentation Technique · Anger Management · Verbal Judo . Integrity · Teambuilding <​div class="LI-profile-badge"​ data-version="v1"​ data-size="medium"​ data-locale="en_US"​ data-type="vertical"​ data-theme="dark"​ data-vanity="keiko2009"​><​a class="LI-simple-link"​ href​='https://nl.linkedin.com/in/keiko2009?trk=profile-badge'​>drs. Jan Sleijfer<​/a><​/div>

  • nl sportpsycholoog at vspn
    2005 - Sep 2020 · 15 yrs 9 mos

    DOCENT SPORTPSYCHOLOGIE VSPN PRAKTIJK SPORTPSYCHOLOOG VSPN